What does Windows error code 8447 (ERROR_DS_DRA_MAIL_PROBLEM) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: The replication operation encountered a mail transport problem.

Previous	Next
ERROR_DS_DRA_OUT_OF_MEM	ERROR_DS_DRA_REF_ALREADY_EXISTS

ERROR_DS_DRA_MAIL_PROBLEM

ERROR_DS_DRA_MAIL_PROBLEM (8447) is an Active Directory replication error. The replication attempt uses a mail-based transport path and that transport failed. Confirm the actual connection transport before troubleshooting ordinary RPC replication, because the relevant configuration and logs are different.

What to check

Inspect the affected connection object and determine whether it is configured for a mail or SMTP-based intersite transport.
Collect the precise mail-transport error and the event-log context from both ends of the connection.
Verify that the topology uses a supported, intended transport rather than assuming the failure is caused by normal LDAP or RPC ports.

Useful command

repadmin /showrepl <DestinationDC> /all /verbose

Microsoft: Repadmin /showrepl · Microsoft: Diagnose AD replication failures · Microsoft: Troubleshoot AD replication problems

Looking for a different code? Search another status or error code.