DFSR Event ID: 2147485861
It seems Server Essentials and possibly others will often show in the daily report a DFSR Event ID: 2147485861 error. There is also a corresponding Warning Event logged in the DFS Replication log (sub-folder of Applications and Services Logs) of the event viewer with Source DFSR and Event ID 2013, followed by an Event ID 2212. This is most often caused by a dirty shutdown.
There are numerous articles on the Internet explaining how to resolve this, but I was told they were not clear to some readers. So, hopefully to clarify:
Firstly open Regedit and locate the key below, and verify it is set to 1. If not change it to 1. (Note: you should always backup the registry before making any changes)
Then in the error message within the report locate the command as highlighted in the image above, but cut and past it from your server report as it will have the correct volume GUID. Make sure it is all one line. You may want to use Notepad to reassemble if broken in the report. You need to use an elevated command prompt to run this.
If you run the command with the wrong GUID it will display; “No Instance(s) Available”.
If successful your command window should look similar to this:
This should resolve the problem, but it may return at some point in the future. The Windows Server 2012 Essentials Build document (wiki article) suggests to prevent this in the future, after running the command successfully, change the aforementioned registry key from 1 to 0. Doing so enables DFS Replication automatic recovery.