Accessing Microsoft Dynamics Marketing OData feeds from .Net code (UPDATED downloads for 17.2 and 18.0)


The typical usage of the Dynamics Marketing feeds is through Power BI. A user would use Excel Pro and with the Power Query plugin he would connect to the OData endpoint of Dynamics Marketing.

e.g. “”

But before the OData endpoint needs to be enabled in the Site Settings – look all at the bottom on that page.

“But is Power Query really the only way to access the OData feed endpoint?”
This question has reached my desk a few times now. First of all: The OData endpoint was designed for analytic reporting. Still it is technically possible to access the service endpoint by other dedicated clients as well. In this post I will lay out how that works and even provide a sample OData client application.

image  This post is targeting the 3rd party developer who is comfortable with using .Net in order to create clients for Dynamics Marketing which communicate of protocol level with the data service. And you should look forward to configure Azure Active Directory and use authentication mechanics in your code.

Accessing the MDM OData endpoint with other tools than PowerQuery is not officially supported for the current releases of Dynamics Marketing.


For the restless reader (“in a few words”)

These are the steps needed to write your own client application that is permitted to connect, send data queries and process responses from the MDM OData endpoint.


  • Define an application in WAAD. You will need the generated App ID in your client application code. Also a response URL is defined n this step.
  • Now make sure that this WAAD app is permitted to connect to the MDM service. You need to use the Graph API or the tool GraphExplorer for this step. Update: Graph Explorer does not support setting app permissions any longer. We are looking into to ways to set the permissions by other means. Until then you can try using the AppID of Power BI.
  • Now write the actual OData consumer application in .Net. When it connects to the OData endpoint it must provide the information from above in the authentication flow. This flow will request the user of your client app to sign in and return an access token, which must be included in the Http header of every following request.
  • When reposes arrive from the OData service, the consumer app will apply a data model and process the data accordingly. A proxy class in .Net for the full OData endpoint of Dynamics Marketing is included in the sample code.


Defining the application in WAAD

An application definition in Azure Active Directory provides the control of the consumers that may use the endpoint of a certain service in a specific subscription. This is used in addition of user credentials to sign in. You need to have an Azure subscription enabled for your organization. (The procedure described in this post will not introduce any costs in your subscription.)

Why do you need that? because as and administrator of Contoso you want to control explicitly which applications or services may access your Dynamics Marketing OData endpoint. PowerQuery in Excel is by default permitted to do so for every deployment of Dynamics Marketing.

Define an application in Azure Active Directory



Note the generated App ID. For the Redirect URI we use http://localhost. We actually doe not need a redirect URI on which we would receive responses to any request for OAuth requests. We are listening in the application directly.



Grant permissions to access the Dynamics Marketing service (to be updated…)

Now we need to grant the permissions to our new Azure app to access Dynamics Marketing. For other services like Dynamics CRM the necessary steps have been take to show the service in the section “permissions to other applications”. But this not available for Dynamics Marketing yet. Therefore we need to take workaround through the so called Graph API. This API has been provided to configure the Active Directory programmatically.

!! Many have reported that Graph Explorer does not support setting the App permissions any longer. We are looking into other ways to allow this configuration !!

But no worries we do not need to write our own Graph API client application in order to do the missing step of granting permissions. The Azure team has provide a sample service called Graph Explorer, which we can use to configure the permissions. Lets open the too and Sign In with the account that can administer Azure account. You as well press then the “Get” button in order to then browse through the different configuration information in your Azure Directory.
You will see of course the address of your own Dynamics Marketing instance for Resource and the Responses below.


Click on “Add Application Permission” in order to establish the trust relationship between your application definition in Azure and the Dynamics Marketing service.




Write the basic code to access the MDM OData endpoint


Prerequisites: In order to build a OData client application you will need to install first the WCF Data Services 5.6.0 RTM Tools. Some of the libraries we need for our experiment are located then on your local machine: C:\Program Files (x86)\Microsoft WCF Data Services\5.6\bin\.NETFramework Notably it is the client library “Microsoft.Data.Services.Client.dll” to which we must add a reference in our project.

The sample client application that comes with this post does two things in order to authenticate:

1. It requests an authorization token by


 this._authenticationContext =new AuthenticationContext(OAuthUrl, false); var result = await this._authenticationContext.AcquireTokenAsync( MDMOAuthTokenResourceName, this.ODataClientAppID, this.RedirectUri, string.Empty, string.Empty);


In the process of getting an the authentication token, the authentication service at will request the user to sign in and provide respective UI

(Find the respective code in CurrentEnvironment.cs)

The authentication token will also be cached such that the user does not have to enter the credentials every time. Resetting the cache token will require the user to sign in again. The application can control that by simply calling:

 (AuthenticationContext.TokenCache as DefaultTokenCache).Clear();

This is a typical activity if the user chooses to sign out or the connection parameters have changed.

2. For each request we send we need to make sure to include the authentication token into the request header.

 // transmit the access token we have received earliervar headerVal =new AuthenticationHeaderValue("Bearer", this._environment.AuthenticationToken); args.Headers.Add("Authorization", headerVal.ToString());

The simple procedure is simply to add a header value of type Authentication to the http request where the Name is “Bearer” and the value is the authentication token that we have received.

Process data with the help of the data model

The easiest way to query and consume entities from a OData service is through a data model in your client application code. Visual Studio allows developers to connect to an OData service endpoint and generate code by adding a service reference. This generates code in form of a DataServiceContext class implementation. And that comes with a query for each entity, a class for each entity with all entity fields as properties, a queries or relations to other table (like Company.Leads).

With such a data model all we need to do is create an instance of the data model for our OData service end point address. Then we need to make sure to subscribe to any activity that builds the http requests for each OData query, so we can inject our authentication token. And with that we are ready to query data and bind the returned data filled with information to any UI we like or use the data in other business logic.

Unfortunately Visual Studio does not know how to use OAuth on the data service of Dynamics Marketing. Therefore I have provided a generated data model as part of this sample application.

You will find that in the source file MDMOData161.cs. This is for the version of the data model that currently is live in the production instances. The sample will need to be updated for future releases.

Try out the Sample App


After you start the OData application for MDM you need to enter the MDM Service Address (without the “/analytics” at the end). Also the reply URI and Client App Id from the definition of the application in Azure.


Next you will need to sign in.


After the Sign in succeeds you will be able to request entities for a few select types. In the sample these are just Contacts, Companies, Leads, Campaigns.

For the selected entity, the client app will retrieve all respective entities from the service.


The sample code shows how to authenticate against WAAD, and use the authentication token to run asynchronous queries on the OData endpoint and also bind the result to a simple generic data view in a Windows 8 Store application.

Download the sample code for Microsoft Dynamics Marketing 2016 (ver. 19.0) from HERE


Christian Abeln

Senior Program Manager

Microsoft Dynamics Marketing

Follow My Curah!s on Microsoft Dynamics Marketing