DFS management console showing unknown servers on SYSVOL replication group

By | September 30, 2018

If you ever saw unknown servers in SYSVOL replication group, event any of DFS Replication Group? Do you know why is reporting unknown and how do I remove the unknown servers from DFS replication group

Also Read: SYSVOL and NETLOGON not shared on Windows server 2016/2012 R2

Do you know why is reporting unknown Members on DFS replication group?

If there is unknown servers in SYSVOL replication group then that might be orphaned Domain Controller, these unknown servers are not any more on your Active Directory Domain, Decommissioned Domain Controllers not cleaned up properly which is showing as unknown servers

This is same for all other DFS servers, if you decommission any of DFS server which is part of DFS replication group or referral servers for DFS name space, then you have to remove this as part of decommission, if not this sever object will showing as unknown servers

Also Read: Why DFSR disk not showing correct free space

Is any issue if we have unknown servers on DFS Replication Group

There is no issues as this servers are used to replicate the date, servers should have been decommissioned and not used anymore

Is any issue if we have unknown servers on DFS folder Target

My understanding, there is no issues as DFS referral been disabled, if the membership status showing enable then still some users are try to connect the box, you have to disable to avoid the impact

Also Read: Why DFS Referral list not showing all the DFS Servers?

Other Impact needs to be considered

If you are not replacing the the server for the location then the users from that location connect to the nearest DFS server as per the site configuration, this needs to considered

Also Read: Force DFS Replication/Force DFSR Members to Replicate on windows server 2008 and 2012

How to remove the unknown servers from DFS Replication on DFS management console

  • Open DFS management console
  • Select Replication
  • Select Domain System Volume
  • Right click the unknown member
  • Select Delete
  • Select OK

How to remove the unknown servers from DFS namespace on DFS management console

  • Open DFS management console
  • Select Namespaces (Domainname\Sysvol)
  • Select Folder Targets
  • Right click the Server
  • Select OK
  • Select Delete
  • Select OK

Also Read:DFS troubleshooting from Client end

Also check if any orphaned object in active directory which is causing the issue

  • Login to Any DC
  • Open ADSIEDIT.MSC
  • Expand below DFS Replication topology container
  • CN=Topology,CN=Domain System Volume,CN=DFSR-Globalsettings,CN=System,DC=Your Domain,DC=Domain Suffix
  • Check and delete old orphaned object under msDFSR-Member

Also Read: DCDIAG and Repadmin shows decommissioned domain controller

Same way you can disable DFS Namespaces Server and Server from replication group, to isolate the sever from users

Also Read: Sysvol Interview Questions and Answers

 

Category: DFS

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