check the DFS Replication event log for any warnings/errors? Log location:Event Viewer > Applications and Services Logs > DFS Replication Also create a DFS diagnostics report and paste the results here. Creating a DFS diagnostics report: 1. Select the DFS replication group, on the right-hand side click Create Diagnostic Report. 2. Select Health Report.  3. Select a name and location for the HTML report. 4. Select all the DFS replication member servers. 5. Select Yes, count backlogged files in this report. 6. Create. Powershell: Restores files and folders that DFS Replication previously preserved. Restore-DfsrPreservedFiles

To check DFSR backlog, run following commands on one of your DFRS servers. dfsrdiag backlog /rgname:<REPLICATION_GROUP_NAME> /rfname:<REPLICATED_FOLDER_NAME> /smem:<SERVER_1> /rmem:<SERVER_2> dfsrdiag backlog /rgname:<REPLICATION_GROUP_NAME> /rfname:<REPLICATED_FOLDER_NAME> /smem:<SERVER_2> /rmem:<SERVER_1> For verbose output, add /v switch at the very end of commands.

If Win2008+ DFS Replication tries to replicate open files and 16 of them are locked at once, would DFSR cease to replicate any further until at least one unlocked? No, those files are skipped and retried. DFSR will retry after one second, two seconds, four seconds, up to twelve times with a maximum timeout of 5 minutes between each retry. DFSR will then stop retrying that file for 10 minutes and re-enter the same retry cycle infinitely. The DFSR events are throttled and the events doesn’t match the actual number of retries. Locked files definitely have a negative effect – all these retries aren’t free – but you will not completely block…