We use the Graph API to register users, send Invite link to user. User opens the link, grants permission to application to access the data, and from then on user will be able to access our application using the Azure Single Sign-on.

Currently, while signing-up(opening the Invite link), in case of any problem, it shows a Request ID, Co-relation ID, and Timestamp.
It would be better if an error message and error code too can be displayed in this page. This would be really helpful for us. As of now we need to reach out the Azure support team for debugging this further.