CRUD Operations on Dynamics 365 CRM Tables with ODATA API

What is Issue?

Performing CRUD operation on Dynamics 365 CRM using API (Rest/ODATA) from other applications.

The Reason-

While performing integration of other application with CRM, creating custom Web API and webservice is having much efforts in terms of time and development. Microsoft already made developers job easy by providing the ODATA API available for their products. How to consume that API in other applications.

Solution-

While performing integration of other application with CRM, rather than creating the custom API or webservice, we can utilize ODATA APIs that can be consumed with the OAuth 2.0 authentication.

Lets take .net application which is consuming ODATA API.

Some time we don’t want to include any third party dll due to some environmental restrictions. so the sample code added below is using only system libraries.

(In case of Json serialization, you can utilize Newtonsoft.Json to avoid the classes to be written manually)

Create records using ODATA API-

#region Create API Call
        /// <summary>
        /// Create the entity Record using API Call
        /// </summary>
        /// <param name="entityname">entity Name</param>
        /// <param name="entity">entity Object with parameter values</param>
        /// <returns></returns>
        public string CreateAPI(string entityname, object entity)
        {
            string funResponse = null;
            string query = entityname;
            string crmRestQuery = apiUrl + query;

            try
            {
                using (MemoryStream streamOpportunitySerialize = new MemoryStream())
                {
                    DataContractJsonSerializer ser = new DataContractJsonSerializer(entity.GetType());
                    ser.WriteObject(streamOpportunitySerialize, entity);
                    streamOpportunitySerialize.Position = 0;
                    StreamReader srOpportunity = new StreamReader(streamOpportunitySerialize);
                    string objectJSON = srOpportunity.ReadToEnd();
                    objectJSON = objectJSON.Replace("_odata_bind", "@odata.bind");

                    HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, crmRestQuery);
                    //add header parameters
                    request.Headers.Add("Authorization", "Bearer " + oauthToken);
                    request.Content = new StringContent(objectJSON);
                    request.Content.Headers.ContentType = MediaTypeHeaderValue.Parse("application/json; charset=utf-8");

                    HttpResponseMessage response = httpClient.SendAsync(request).Result;
                    string responseString = response.Content.ReadAsStringAsync().Result;

                    if (response.IsSuccessStatusCode)
                    {
                        string _recordUrl = response.Headers.GetValues("OData-EntityId").FirstOrDefault();
                        string[] splitRetrievedData = _recordUrl.Split('[', '(', ')', ']');
                        funResponse = splitRetrievedData[1];
                    }
                    else
                        funResponse = responseString;

                }
            }
            catch (Exception ex)
            {
                funResponse = ex.Message;
            }
            return funResponse;
        }
        #endregion

Update records using ODATA API-

  #region Update API Call
        /// <summary>
        /// Update the entity record using API Call
        /// </summary>
        /// <param name="entityname">entity name</param>
        /// <param name="entityid">entity id</param>
        /// <param name="entity">entity Object with parameter values</param>
        /// <returns></returns>
        public string UpdateAPI(string entityname, string entityid, object entity)
        {
            string funResponse = null;
            string query = entityname + "(" + entityid + ")";
            string crmRestQuery = apiUrl + query;
            try
            {
                using (MemoryStream streamOpportunitySerialize = new MemoryStream())
                {

                    DataContractJsonSerializer ser = new DataContractJsonSerializer(entity.GetType());
                    ser.WriteObject(streamOpportunitySerialize, entity);
                    streamOpportunitySerialize.Position = 0;
                    StreamReader srOpportunity = new StreamReader(streamOpportunitySerialize);
                    string objectJSON = srOpportunity.ReadToEnd();
                    objectJSON = objectJSON.Replace("_odata_bind", "@odata.bind");

                    HttpMethod method = new HttpMethod("PATCH");
                    HttpRequestMessage request = new HttpRequestMessage(method, crmRestQuery);
                    //add header parameters
                    request.Headers.Add("Authorization", "Bearer " + oauthToken);
                    request.Headers.Add("If-Match", "*");      //preventing creation of new record if no record found with ID
                    request.Content = new StringContent(objectJSON);
                    request.Content.Headers.ContentType = MediaTypeHeaderValue.Parse("application/json; charset=utf-8");

                    HttpResponseMessage response = httpClient.SendAsync(request).Result;
                    string responseString = response.Content.ReadAsStringAsync().Result;
                    if (response.IsSuccessStatusCode)
                    {
                        funResponse = "Sucessfully Updated Record!!";
                    }
                    else
                        funResponse = responseString;
                }
            }
            catch (Exception ex)
            {
                funResponse = ex.Message;
            }
            return funResponse;
        }
        #endregion

Delete records using ODATA API-

#region Delete API Call
        /// <summary>
        /// Delete the entity Record using API Call
        /// </summary>
        /// <param name="entityname">entity Name</param>
        /// <param name="entityid">Entity id</param>
        /// <returns></returns>
        public string DeleteAPI(string entityname, string entityid)
        {
            string funResponse = null;
            string query = entityname + "(" + entityid + ")";
            string crmRestQuery = apiUrl + query;

            try
            {
                HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Delete, crmRestQuery);
                //add header parameters
                request.Headers.Add("Authorization", "Bearer " + oauthToken);
                request.Headers.Add("Accept", "application/json; charset=utf-8");

                HttpResponseMessage response = httpClient.SendAsync(request).Result;
                string responseString = response.Content.ReadAsStringAsync().Result;
                if (response.IsSuccessStatusCode)
                    funResponse = "Deleted!!!";
                else
                    funResponse = responseString;
            }
            catch (Exception ex)
            {
                funResponse = ex.Message;
            }
            return funResponse;
        }
        #endregion

Retrieve Single record using ODATA API-

 /// <summary>
        /// Retrieve single using API Call
        /// </summary>
        /// <param name="entityPluralName">entity Name</param>
        /// <param name="entityId">entity id</param>
        /// <param name="entityObject">blank entity object</param>
        /// <param name="selectColumns">select columns to retrieve in API Call</param>
        /// <returns>Object of entity</returns>
        public object RetrieveSingle(string entityPluralName,string entityId,object entityObject, string selectColumns=null)
        {
            string query = "("+entityId+")";
            if (selectColumns != null) {
                query += "?$select=" + selectColumns;
            }
            string crmRestQuery = apiUrl + entityPluralName + query;
            try
            {
                    HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, crmRestQuery);
                    //add header parameters
                    request.Headers.Add("Prefer", "odata.include-annotations=\"*\"");//for formatted values
                    request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/XML"));
                    request.Headers.Add("Authorization", "Bearer " + oauthToken);

                    //send request
                    HttpResponseMessage response = httpClient.SendAsync(request).Result;
                    string responseString = response.Content.ReadAsStringAsync().Result;
                    responseString = FormatResponse(responseString);

                    using (var ms = new MemoryStream(Encoding.Unicode.GetBytes(responseString)))
                    {
                        // Deserialization from JSON  
                        DataContractJsonSerializer deserializer = new DataContractJsonSerializer(entityObject.GetType());
                    entityObject = (object)deserializer.ReadObject(ms);
                    }
                    
            }
            catch (Exception ex){ throw ex; }
            return entityObject;
        }

Retrieve Multiple records using ODATA API-

  /// <summary>
        /// Retrieve multiple using Fetch XML in API Call
        /// </summary>
        /// <param name="entityPluralName">entity name</param>
        /// <param name="fetchXML">fetchXML string</param>
        /// <returns>List of retrieved Objects</returns>
        public List<RetrieveOpportunity> RetrieveMultiple(string entityPluralName, string fetchXML)
        {
            fetchXML = fetchXML.Replace("<fetch", "<fetch {0} ");
            int page = 1;
            var cookie = string.Format("page='{0}'", page);
            string xml = string.Format(fetchXML, cookie);
            string crmRestQuery = apiUrl + entityPluralName + "?fetchXml=" + xml;
            List<RetrieveOpportunity> lstOpties = new List<RetrieveOpportunity>();
            bool isDone = false;
            try
            {
                while (isDone == false)
                {
                    isDone = true;
                    HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, crmRestQuery);
                    //add header parameters
                    request.Headers.Add("Prefer", "odata.include-annotations=\"*\"");//for formatted values
                    request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/XML"));
                    request.Headers.Add("Authorization", "Bearer " + oauthToken);

                    //send request
                    HttpResponseMessage response = httpClient.SendAsync(request).Result;
                    string responseString = response.Content.ReadAsStringAsync().Result;
                    responseString = FormatResponse(responseString);

                    using (var ms = new MemoryStream(Encoding.Unicode.GetBytes(responseString)))
                    {
                        // Deserialization from JSON  
                        DataContractJsonSerializer deserializer = new DataContractJsonSerializer(typeof(APIResult));
                        APIResult apiResult = (APIResult)deserializer.ReadObject(ms);

                        if (!string.IsNullOrEmpty(apiResult.Microsoft_Dynamics_CRM_fetchxmlpagingcookie))
                        {
                            isDone = false;
                            page++;

                            //retrieve pagingCookie value
                            string xmlVal = WebUtility.UrlDecode((WebUtility.UrlDecode((string)apiResult.Microsoft_Dynamics_CRM_fetchxmlpagingcookie)));
                            int Start = xmlVal.IndexOf("pagingcookie=\"", 0) + "pagingcookie=\"".Length;
                            int End = xmlVal.IndexOf("\" istracking=\"False\"", Start);

                            //proccess the pagingCookie value to support in API URL
                            string strVal = xmlVal.Substring(Start, End - Start).Replace("<", "%26lt;").Replace(">", "%26gt;").Replace("\"", "%26quot;").Replace("'", "%26apos;").Replace("&", "%26amp;");
                            cookie = string.Format("page='{0}' paging-cookie='{1}'", page, strVal);

                            //modify the query for next page with paging cookie
                            xml = string.Format(fetchXML, cookie);
                            crmRestQuery = apiUrl + entityPluralName +"?fetchXml=" + xml;

                        }
                        if (!string.IsNullOrEmpty(apiResult.odata_nextLink))
                        {
                            isDone = false;
                            crmRestQuery = apiResult.odata_nextLink;
                        }

                        if (lstOpties == null || lstOpties.Count == 0)
                        {
                            lstOpties = apiResult.value;
                        }
                        else
                        {
                            lstOpties.AddRange(apiResult.value);
                        }
                    }
                }
            }
            catch (Exception ex) {
                throw ex;
            }
            return lstOpties;
        }

        public List<RetrieveOpportunity> RetrieveMultiple(string entityPluralName, string selectColumns,string filterConditions=null, string orderby=null,bool returnCount=false)
        {
           string query= "?$select=" + selectColumns;
            if (filterConditions != null) {
                query += "&$filter=" + filterConditions;
            }
            if (orderby != null) {
                query += "&$orderby=" + orderby;
            }
            if (returnCount == true) {
                query += "&$count=true";
            }

            string crmRestQuery = apiUrl + entityPluralName +  query;
            List<RetrieveOpportunity> lstOpties = new List<RetrieveOpportunity>();
            bool isDone = false;
            try
            {
                while (isDone == false)
                {
                    isDone = true;
                    HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, crmRestQuery);
                    //add header parameters
                    request.Headers.Add("Prefer", "odata.include-annotations=\"*\"");//for formatted values
                    request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/XML"));
                    request.Headers.Add("Authorization", "Bearer " + oauthToken);

                    //send request
                    HttpResponseMessage response = httpClient.SendAsync(request).Result;
                    string responseString = response.Content.ReadAsStringAsync().Result;
                    responseString = FormatResponse(responseString);

                    using (var ms = new MemoryStream(Encoding.Unicode.GetBytes(responseString)))
                    {
                        // Deserialization from JSON  
                        DataContractJsonSerializer deserializer = new DataContractJsonSerializer(typeof(APIResult));
                        APIResult apiResult = (APIResult)deserializer.ReadObject(ms);
                        
                        if (!string.IsNullOrEmpty(apiResult.odata_nextLink))
                        {
                            isDone = false;
                            crmRestQuery = apiResult.odata_nextLink;
                        }

                        if (lstOpties == null || lstOpties.Count == 0)
                        {
                            lstOpties = apiResult.value;
                        }
                        else
                        {
                            lstOpties.AddRange(apiResult.value);
                        }

                    }
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return lstOpties;
        }

Some common Methods in above Code –

  #region Local variables
        /// <summary>
        /// Local Variables
        /// </summary>
        private string clientID, secretKey, resource, oauthToken, apiUrl, tokenURL;
        private HttpClient httpClient;

        /// <summary>
        /// Constructor to initialize the variables
        /// </summary>
        public Operations()
        {
            apiUrl = "https://mscrm16tech.crm8.dynamics.com/api/data/v8.2/";
            clientID = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx";
            secretKey = "asdasdxzxczdsdaasda";
            resource = "https://mscrm16tech.crm8.dynamics.com";
            tokenURL = "https://login.microsoftonline.com:443/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/oauth2/token/";
        }
        #endregion 
 #region Generate Bearer Token
        /// <summary>
        /// Function to generate Bearer token OAuth2.0 using client id and secret
        /// </summary>
        /// <returns>access token</returns>
        public string GetBearerToken()
        {
            oauthToken = null;
            HttpClientHandler clientHandler = new HttpClientHandler();
            clientHandler.Proxy = WebRequest.GetSystemWebProxy();
            clientHandler.Proxy.Credentials = CredentialCache.DefaultCredentials; // or new NetworkCredential("username","password","DOMAIN");
            clientHandler.UseProxy = true;
            httpClient = new HttpClient(clientHandler);
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
            HttpContent requestContent = new FormUrlEncodedContent(new Dictionary<string, string>
            {
                {"grant_type","client_credentials"},
                {"client_id",clientID},
                {"client_secret",secretKey},
                {"resource",resource}
            }
            );
            HttpResponseMessage response = httpClient.PostAsync(tokenURL, requestContent).Result;
            String responseString = response.Content.ReadAsStringAsync().Result;
            using (var ms = new MemoryStream(Encoding.Unicode.GetBytes(responseString)))
            {
                // Deserialization from JSON  
                DataContractJsonSerializer deserializer = new DataContractJsonSerializer(typeof(BearerToken));
                BearerToken token = (BearerToken)deserializer.ReadObject(ms);
                oauthToken = token.access_token;
            }

            return oauthToken;
        }
        #endregion
#region Common Methods
       public string FormatResponse(string responseString) {
            responseString = responseString.Replace("@odata.etag", "odata_etag");
            responseString = responseString.Replace("@OData.Community.Display.V1.FormattedValue", "_OData_Community_Display_V1_FormattedValue");
            responseString = responseString.Replace("@Microsoft.Dynamics.CRM.associatednavigationproperty", "_Microsoft_Dynamics_CRM_associatednavigationproperty");
            responseString = responseString.Replace("@Microsoft.Dynamics.CRM.lookuplogicalname", "_Microsoft_Dynamics_CRM_lookuplogicalname");
            responseString = responseString.Replace("@Microsoft.Dynamics.CRM.lookuplogicalname", "_Microsoft_Dynamics_CRM_lookuplogicalname");
            responseString = responseString.Replace("@odata.context", "odata_context");
            responseString = responseString.Replace("@Microsoft.Dynamics.CRM.totalrecordcount", "Microsoft_Dynamics_CRM_totalrecordcount");
            responseString = responseString.Replace("@Microsoft.Dynamics.CRM.totalrecordcountlimitexceeded", "Microsoft_Dynamics_CRM_totalrecordcountlimitexceeded");
            responseString = responseString.Replace("@Microsoft.Dynamics.CRM.fetchxmlpagingcookie", "Microsoft_Dynamics_CRM_fetchxmlpagingcookie");
            responseString = responseString.Replace("@Microsoft.Dynamics.CRM.morerecords", "Microsoft_Dynamics_CRM_morerecords");
            responseString = responseString.Replace("@odata.nextLink", "odata_nextLink");
            return responseString;
        }
        #endregion

Sample Class for Json Serialization in API Calls-

This class is not needed in you are using Newtonsoft.Json library.

using System.Collections.Generic;
using System.Runtime.Serialization;

namespace ODATA_API
{
    [DataContract]
    public class BearerToken
    {
        [DataMember]
        public string token_type;
        [DataMember]
        public string expires_in;
        [DataMember]
        public string ext_expires_in;
        [DataMember]
        public string expires_on;
        [DataMember]
        public string not_before;
        [DataMember]
        public string resource;
        [DataMember]
        public string access_token;
    }

    [DataContract]
    public class CreateUpdateOpportunity {
        [DataMember]
        public string name;
        [DataMember]
        public string estimatedclosedate;
        [DataMember]
        public string parentaccountid_odata_bind;
        [DataMember]
        public decimal estimatedvalue;
        [DataMember]
        public string transactioncurrencyid_odata_bind;
    }
    [DataContract]
    public class RetrieveOpportunity
    {
        [DataMember]
        public string _odata_context;
        [DataMember]
        public string _odata_etag;
        [DataMember]
        public string estimatedclosedate_OData_Community_Display_V1_FormattedValue;
        [DataMember]
        public string estimatedclosedate;
        [DataMember]
        public string estimatedvalue_OData_Community_Display_V1_FormattedValue;
        [DataMember]
        public string estimatedvalue;
        [DataMember]
        public string estimatedvalue_base_OData_Community_Display_V1_FormattedValue;
        [DataMember]
        public string estimatedvalue_base;
        [DataMember]
        public string name;
        [DataMember]
        public string _parentaccountid_value_OData_Community_Display_V1_FormattedValue;
        [DataMember]
        public string _parentaccountid_value;
        [DataMember]
        public string opportunityid;
        [DataMember]
        public string _transactioncurrencyid_value_OData_Community_Display_V1_FormattedValue;
        [DataMember]
        public string _transactioncurrencyid_value;
    }

    [DataContract]
    public class APIResult
    {
        [DataMember]
        public string odata_context;
        [DataMember]
        public int Microsoft_Dynamics_CRM_totalrecordcount;
        [DataMember]
        public bool Microsoft_Dynamics_CRM_totalrecordcountlimitexceeded;
        [DataMember]
        public string Microsoft_Dynamics_CRM_fetchxmlpagingcookie;
        [DataMember]
        public bool Microsoft_Dynamics_CRM_morerecords;
        [DataMember]
        public string odata_nextLink;
        [DataMember]
        public List<RetrieveOpportunity> value;
    }

}

Calling the Above methods Sample-

static void Main(string[] args)
        {
            Operations ops = new Operations();
            Console.WriteLine("Started!!");
            Console.WriteLine(ops.GetBearerToken());
            
            CreateUpdateOpportunity entity = new CreateUpdateOpportunity();

            entity.transactioncurrencyid_odata_bind = "/transactioncurrencies(c63ba581-6bc6-e811-a96f-000d3af04fb0)";
            entity.estimatedvalue = 1000;
            entity.estimatedclosedate = "2021-01-01";
            entity.name = "Generated From C# Code";
            entity.parentaccountid_odata_bind = "/accounts(3b3b7c71-61d2-ea11-a813-000d3af0205e)";
            //create record
            string recordGuid = ops.CreateAPI("opportunities", entity);
            Console.WriteLine(recordGuid);
           
            //update record
            entity.name = "Generated From CSharp Code";
            Console.WriteLine(ops.UpdateAPI("opportunities", recordGuid, entity));

            //retrieve record
            RetrieveOpportunity retrieveOpportunity = new RetrieveOpportunity();
            retrieveOpportunity =(RetrieveOpportunity)ops.RetrieveSingle("opportunities", recordGuid,retrieveOpportunity);
            Console.WriteLine(retrieveOpportunity.name);

            //delete Record
            Console.WriteLine(ops.DeleteAPI("opportunities", recordGuid));


            Console.Read();
        }

Hope this will help…
Enjoy Ms CRM!!!

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Check highest privileges for entities from different Security roles assigned (including Teams Roles) to User in MS CRM

What is Issue?

User in CRM might be assigned with the different security roles directly or indirectly from Teams security role. Some time it becomes difficult to check privileges on some entity, due to number of different security roles assigned. In this cases, checking different security roles for user becomes tedious and time consuming task. You need to check each security role and each security roles for team in which user is member.

The Reason-

No direct way available to check highest privileges on entities for an user.

Solution-

you can use the tool created by mscrm16Tech as below-
It provides view of all security roles assigned directly or indirectly through Team to user.

When you install and open the application in your system you will get below window which will help you in configuration of MS CRM connection and database connection if needed.

AppScreen1

After configuring the app and clicks on OK, Select the application “Check User Privileges on Entity” in next window  –

App3Screen0

Now you need to load the available active (Enabled) users in connected CRM Organization.
You can select any user from the drop down list and get Privileges for the user.

You also have option to check security roles for entities for some publisher only(custom entities).

The output loaded in grid will show highest privileges on entities available to user cumulatively from all security security roles.

Please use below image for reference-

App3Screen1

Please follow the images to work with the app.

You can find the list of all available security roles assigned directly or indirectly through teams to user.

On click of first option in List -“Get Cumulative privileges for all Roles”  will show the all highest privileges from all the different security roles. and on click of other options in list will show the privileges for that role.

You can save this report as excel file.

You can download MSCRMTechTool Here- MSCRM16Tech Tool

Hope this will help…
Enjoy Ms CRM!!!

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Generating Early Bound Classes and simple Entity Classes MS CRM

What is Issue?

While developing the CRM, when we have to go through coding part, we need to create Early-bound classes for some specific entities. But CrmSvcUtil.exe provides us the Early Bound classes for all the entities available in CRM.
Second scenario- we don’t want this much of complicated classes, Only want to add simple Entity classes. But it might become very lengthy and time consuming task to add the fields in class one by one.

The Reason-

Creating Early bound classes for particular entities is not possible using CrmSvcUtil.exe directly and creating simple entity classes is lengthy and time consuming task.

Solution-

To create early bound classe using CrmSvcUtil.exe, please refer blog – Generate Early Bound Classes for selected entities using CrmSvcUtil.exe in MS CRM

OR

you can use the tool created by mscrm16Tech as below-
It provides both the options like creating Simple CRM entity classes or to Use CrmSvcUtil.exe to generate early bound classes for selected entities only.

When you install and open the application in your system you will get below window which will help you in configuration of MS CRM connection and database connection if needed.

AppScreen1

After configuring the app and clicks on OK, Select the application “Create Early-Bound Classes” in next window  –

App2Screen0

Now you can load the available entities in connected CRM Organization. Please use below image for reference-

App2Screen In case you are using windows 10 and trying to generate Early Bound classes using CrmSvcUtil.exe, you need to make sure following feature is enabled on your windows-
>Control Panel Programs and Features – Turn Windows feature On or Off
->.NetFramework 4.8 Advanced Services
-> WCF Services
->HTTP Activation (Please enable if not)

App2Screen1

Please follow the images to work with the app.

You can download app Here- MSCRM16Tech Tool

Hope this will help…
Enjoy Ms CRM!!!

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Get Excel Report or Create Database table Directly from FetchXML file

What is Issue?

The creating report or database table using complex fetchXML and getting records more than 5000.

The Reason-

It is difficult to get data directly from MS CRM without any coding or using third party tool .

Solution-

Here is the new tool created by mscrm16tech which allows you to save data in excel sheet from MS CRM or helps you to create Database table with the display names available in MS CRM. These reports and data dump minimizes the developer efforts.

When you install and open the application in your system you will get below window which will help you in configuration of MS CRM connection and database connection if needed.

AppScreen1

After configuring the app and clicks on OK, you will get below window –

AppScreen2

Please follow the images to work with the app.

You can download app Here- FetchApp by MSCRM16Tech

Hope this will help…
Enjoy Ms CRM!!!

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Call MS CRM Web API outside CRM Applicaiton or with Postman

What is Issue?

MS CRM provides out-of-box Web API which we mostly use in javascript to get data from entities whenever required. But there are many situations where your company uses different applications and CRM is one of them. The data across company can be used in any of these application in real time. So instead of writing custom Web API, if MS CRM provides out-of-box Web API, can we use that in any other application? or is it possible to call MS CRM APIs using postman for testing purpose before used in any other application?

The Reason-

MS CRM provides the way to get data from entities with calling Web API. But mostly we use this API calls within CRM application. When calling Web API within CRM , user is already logged in to the CRM which do not need any extra authorization. When we try to calls these Web API out side CRM it requires authorization to access data from CRM.

Solution-

To Call Web APIs outside MS CRM environment you need to get Bearer token for the user using OAuth2.0 authorization.

Lets take example – WebAPI to get all Accounts- https://xxxxx.crm8.dynamics.com/api/data/v8.2/accounts

Lets generate bearer token to access above WebAPI from Postman-
I am considering You have registered the Azure app and you have Client Id and Client secrete with you for this app.
In Postman- New request add your request –

    1. Go to the Authorization tab
    2. Select Type – OAuth2.0
    3. Click on Get New Access TokenPostMan0
    4. In popup window please enter all required information as below-PostMan
    5. Grant Type – Authorization Code
    6. Enter Callback URL provided in Azure App – Redirect URI
    7. Enter Auth URL –
      https://login.windows.net/common/oauth2/authorize?resource=https://xxxxx.crm8.dynamics.com
    8. Access Token URL –
      https://login.microsoftonline.com/common/oauth2/token
    9. Enter Client Id and Client Secret you have.(Azure App client details).
    10. Click on Request Token.
    11. Microsoft login window will popup. Enter your credentials to login.On successful authentication, It will bring an access token for you.
    12. Select Access Token you have generated just a while before from Available tokens in postman.
    13. Don’t forget to select Add authorization data to – Request HeaderPostMan2
    14. Now you can send the request and test your MS CRM Web APIs.
    15. You can use the Code option in postman to generate code according to your programming needs.PostMan3

You can use the same parameters when generating bearer token for the user using code.

How to get bearer token using Postman-

  1. Use Post Method and URL-
    https://login.microsoftonline.com/common/oauth2/token
  2. Add below details to Body of the request as form-data-
    – grant_type – client_credentials
    – user’s credentials : username and password
    – other details – client_id and client_secret as described above. -resource : your MS CRM url.
  3. PostMan4

Using the bearer token generated you can access MS CRM Web APIs in any application.

Hope this will help…
Enjoy Ms CRM!!!

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