Hi @andreas.gabriel ,
Thanks, of posting you query on Microsoft Q&A. I was able to review all the possibilities but found: "To add or delete users, you must be a User Administrator or Global Administrator" Ref URL: https://learn.microsoft.com/en-us/azure/active-directory/fundamentals/add-users-azure-active-directory.
I would request you to check with the tenant admin or IT team handling the tenant to help you with this.
Please do let me know if you have any queries in the comments section.
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