RE: Has anybody used any of the Dynamics 365 integration endpoints listed here: https://docs.microsoft.com/en-us/dynamics-nav/endpoints-apis-for-dynamics
The API is the same regardless if using the api.financials.dynamic.com endpoint, or going directly to the tenant.
The difference is the authentication being used, where the common endpoint allows automatically delegation to the provided AAD users tenant, and thus also avoid having to specify any tenant specific endpoint url.
How old is your AAD tenant? I believe that the names for other AppIds gets locked at the time of AAD tenant creation, so we might appear as, e.g., Project Madeira, which was the preview name of the service.
A shortcut is to copy our AppId directly into the AAD manifests reqiuredResourceAccess list
"requiredResourceAccess": [
{
"resourceAppId": "996def3d-b36c-4153-8607-a6fd3c01b89f",
"resourceAccess": [
{
"id": "bce0976a-cb0b-473b-8800-84eda9f8e447",
"type": "Scope"
}
]
}
]