Active Directory and DFS-R Auto-Recovery

Back in January 2012, Microsoft released KB2663685 which changes the default behaviour of DFS-R replication and it effects Active Directory. Prior to the hotfix, when a DSF-R replication group member performs a dirty shutdown, the member would perform an automatic recovery when it came back online however after the hotfix, this is no longer the case. This behaviour change results in a DFS-R replication group member halting replication after a dirty shutdown awaiting manual intervention. Your intervention choices range from manually activating the recovery task to decommissioning the server and replacing it, all depending on the nature of the dirty shutdown. What we need to understand however is that a dirty shutdown can happen more often than you think so it’s important to be aware of this.