Event ID 1864 — Active Directory replication too old or absent

A domain controller reports that he has not recently received replication from some partners.

Source of event

NTDS Replication — Active Directory category.

Possible causes

• DC offline
• Network link
• DNS or PRC
• Replica partner incorrectly deleted

Verifications to be carried out

1. Run repadmin /showrepl
2. Identify the mistaken partner
3. Check time since last replication

Useful orders.

repadmin /showrepl

repadmin /replsummary

To be retained.

An Event ID must always be interpreted with its source, its full message, its timing and the context of the system. The same number may exist in several providers of events.