For a Power App connected to our Dataverse I have created a security group in Power Platform Admin Center that has read/write permission to our custom tables. I've added multiple users to the security group but cannot add one specific user. She is in our Azure AD, has an active Microsoft 365 A3 for faculty license but she is nowhere to be found as a user in Power Platform or Dynamics 365. Therefore, I cannot add her to this security group.
There's more to it.. I also can't add an entire Team to the security group (it doesn't show up in the lookup box) and cannot add 3 other users who do show up in PP and Dynamics but are disabled. They have an active A1 license and 2 of them have been added successfully before to this security group but all three are now disabled.
I've searched and cannot find a similar problem, so I reach out to the community.
Does anyone have a clue in which direction we should find the solution?
Thank you in advance!