OAuth 2.0 Client Credential | "You do not have the following permissions on Page APIV1 - Customers: Execute." Error

Question

I am new to Business Central and I have an API that needs to consume Business Central API.

I have setup the application in Azure AD and also setup the created app in Azure in Business central.

However, whenever I am invoking an API in BC using the token I receive from "https://login.microsoftonline.com/{tenant}/oauth2/v2.0/token" endpoint I am getting an error.

I am not sure what permission I need to assign to the registered application. I have assigned Admin, Full access and Super but no luck.

Error:

{
"error": {
"code": "Internal_ServerError",
"message": "You do not have the following permissions on Page APIV1 - Customers: Execute.\r\n\r\nTo view details about your permissions, see the Effective Permissions page. To report a problem, refer to the following server session ID: '295'. CorrelationId: 81c53d83-6843-4da9-8251-2f1980ef2ad4."
}
}

Answer 1

Based on your error it sounds like a licensing issue. Do you have the necessary license assigned? I am not sure about your exact scenario requirements but it looks like you may need a Business Central or Partner license.

Please also share any additional logs you may have.

I would also recommend reaching out on the Dynamics 365 forum since this issue seems more related to that. https://community.dynamics.com/f

Answer 2

I got the same error when accessing my own api page and solved it by adding more permissions to the client id in Azure Active Directory Application Card in BC.
I added D365 BASIC in User Permission Sets, but maybe you can do with less or need more permissions.