Windows error 8465 (ERROR_DS_DRA_SOURCE_IS_PARTIAL

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: A master replica attempted to synchronize from a partial replica.

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ERROR_DS_DRA_INCOMPATIBLE_PARTIAL_SET	ERROR_DS_DRA_EXTN_CONNECTION_FAILED

ERROR_DS_DRA_SOURCE_IS_PARTIAL_REPLICA

ERROR_DS_DRA_SOURCE_IS_PARTIAL_REPLICA (8465) is an Active Directory replication error. A writable or master replica attempted to source changes from a partial replica. The replication direction or replica role is not valid for this operation.

What to check

Identify the source and destination roles for the failing naming context, including whether either side is a global catalog or read-only domain controller.
Inspect connection objects and site topology for a relationship that directs a full replica to synchronize from an unsuitable source.
Correct the topology only after confirming which servers should host a full replica of the partition.

Useful command

repadmin /showrepl <DestinationDC> /all /verbose

Microsoft: Diagnose AD replication failures · Microsoft: RODCs and the partial attribute set · Microsoft: Repadmin /showrepl

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