OAuth 2.0 Client Credential Grant for Dynamics 365 Business Central

TESDeveloper · 2022-08-19

I am attempting to connect to any of the Business Central Web Services via postman using the grant type client_credentials.

I can receive a token from the call below ok:

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However, if I attempt to use this token in the call below I receive error 401.

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I have the App Registration set up with the following granted permissions:

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I also have the Azure Application registered and granted in Business Central.

Any help is appreciated.

Edit: RESOLVED!

The issue was that I was calling the incorrect token URL. This should have been https://login.microsoftonline.com/{tenant ID}/oauth2/v2.0/token

ftornero · 2022-08-19

Hello @TESDeveloper,

I think that the problem is the URL that you are calling, I assume that you are calling a codeunit, so the URL must to be:

https://api.businesscentral.dynamics.com/v2.0/47fe7048-3f97-4ada-b80f-9e03f8a9b48a/Upgrade/ODataV4/ws_Charity_Conta?company='CRONUS%20UK%20Ltd.'

OAuth 2.0 Client Credential Grant for Dynamics 365 Business Central

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