Hello,
Based on my research, this error is usually related to user credential synchronization issues or domain trust relationship failures.
Does this account involve Azure Virtual Desktop? If yes, check that the user's UPN is consistent in the local Active Directory and Azure Active Directory. And accounts are synchronized between these directories. This helps avoid authentication issues.
If I misunderstand your environment, please supplement it.
References:
Azure Virtual Desktop Login Error Code 0x3000047 - Microsoft Q&A
Re: Error when connecting to MVD - 0x3000047 - Microsoft Community Hub
Best regards
Jacen
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