What does Windows error code 8442 (ERROR_DS_DRA_INTERNAL_ERROR) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: The Active Directory replication subsystem encountered an internal error.

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ERROR_DS_DRA_INTERNAL_ERROR

ERROR_DS_DRA_INTERNAL_ERROR (8442) is an Active Directory replication error. The DRS subsystem reported an internal condition for which it did not return a more specific replication code. The first Directory Service event or nested error around the same timestamp is more useful than the wrapper code.

What to check

Collect repadmin /showrepl output and Directory Service events from both partners before restarting services or changing topology.
Check whether the error is limited to one naming context or appears on every inbound partner.
If database or storage events accompany it, treat the condition as potential directory-service health issue rather than a simple transport failure.

Useful command

repadmin /showrepl <DestinationDC> /all /verbose

Microsoft: Diagnose AD replication failures · Microsoft: Troubleshoot AD replication problems

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