Failed internal Azure AD authentication with Dynamics 365 portal

If you’ve ever had contact with a Dynamics 365 portal, you’ve probably noticed the “Azure AD” button. This enables authentication with the Azure AD of your Dynamics environment.

But we had an error when rolling out the portal, so I had to restart the process. After successful completion, the portal could be reached at “MYURL. microsoftcrmportals. com”, but the Azure AD registration failed.

Failed internal Azure AD authentication with Dynamics 365 portal
Failed internal Azure AD authentication with Dynamics 365 portal

I will spare you the execution of my whole Trail&Error orgy and tell you what the problem is.

Solution

During the deployment the reply addresses of the registered Azure AD APP have been missconfiguered. To find it navigate in your browser to portal.azure.com and click:

Failed internal Azure AD authentication with Dynamics 365 portal
Failed internal Azure AD authentication with Dynamics 365 portal

The reply adresses looked like (notice the “1” at the end of the subdomain)

Failed internal Azure AD authentication with Dynamics 365 portal

but the should be like

Failed internal Azure AD authentication with Dynamics 365 portal

So I edited the first entry and add the second (https://portaladmin-eur.portal-infra.dynamics.com/PortalDetails/AuthorizationResult/YOUR_ID). You find the needed ID for the second in the admin console of your portal.

Failed internal Azure AD authentication with Dynamics 365 portal