Hi,
Thanks for posting in Microsoft MECM Q&A forum.
Are you using the gsma Data Reader account (for SSRS)? If yes, please make sure it is a member of Operations Manager Report Security Administrators group. And also verify if the managed service account can be used on the management server you selected.
Refer to the official article: Support for group managed service accounts
Hope it helps. Thanks for your time.
Best regards,
Simon
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