I assigned an AAD Service Principal as an Owner of an AAD Group in order to allow this Service Principal to manage certain groups without having to provide him with the ability to manage all groups.
I would expect that this SP is now able to manage the membership but receive the following error message when using the MS Graph.
Code: Authorization_RequestDenied Message: Insufficient privileges to complete the operation.
The old AAD Graph API causes a similar error.
How can I provide a Service Principal with the means to only manage selected AAD Groups?