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Principal Type not Supported Errors in Azure SQL DB/MI

Sabrin Alsahsah takes us through a few common causes of Azure Active Directory errors in Azure SQL Database and SQL Managed Instances:

We received some support cases when customers encounter the error below while trying to add an AAD security group to their Azure SQL Database or Azure SQL managed instance. In this blog article, we will be listing a few points to be checked to troubleshoot this error and can help you to identify the cause.

Msg 33130, Level 16, State 1, Line 1

Principal ‘XXXXXX’ could not be found or this principal type is not supported.

Read on for several reasons why things might be going wrong.