Hello,
Thank you for posting in Q&A forum.
Domain controllers without shared can't replicate inbound because of upstream (source) domain controllers being in an error state. Frequently (but not limited to), the upstream servers have stopped replication because of a dirty shutdown (event ID 2213).SYSVOL
For more details, I recommend you to refer to the steps in the following link for troubleshooting:
I hope the information above is helpful.
Best regards
Zunhui
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