OAuth 2.0 Client Credential Grant for Dynamics 365 Business Central

Question

Hi,

Wanted to create a windows console service that will run on the backend of a server to connect to my application and to Dynamics 365: Business Central.
Planning to use OAuth 2.0 client credentials to get token and consume business central endpoints.

Here are the following steps I have made so far:

• App Registration to able to use client_ID
• Client secret for client secret
• Used grant type client_credentials to get access token
• Used the following base addresses to test out the token access but none of them seems to work
  https://login.microsoftonline.com/{client_id}/oauth2/v2.0/token
  https://login.microsoftonline.com/{tenant_id}/oauth2/v2.0/token

Also tried the postman example provided inthe documentation, they, however, will return a token but not the correct one as it is unauthorized
https://login.windows.net/{tenant}.onmicrosoft.com/oauth2/authorize?resource=https://api.businesscentral.dynamics.com
https://login.windows.net/{tenant}.onmicrosoft.com/oauth2/token?resource=https://api.businesscentral.dynamics.com

GetAccessToken code similar to this https://api.codeproject.com/Samples/ClientCredCsDoc

Would really appreciate help here

Answer 1

Hi @it_businesscentral · Thank you for reaching out.

Could you please share what error you are getting while requesting for the token using Client_Credentials flow?

I have provided a screenshot of the call from my tenant for your reference:

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