Hi,
Thanks for posting in Microsoft MECM Q&A forum. According to your description, this issue is more related on Microsoft Authentication, it's recommended that you post a new thread in Microsoft Authentication Forum to get better support. The support link is as below:
Thanks for your understanding.
Best regards,
Simon
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After the way you tag questions on Q&A is updated, for any "Microsoft Configuration Manager" related problem, you can tag it with "Microsoft Intune", and then "Microsoft Configuration Manager" as the child tag.