Posts tagged ‘POLLAD’
SYSVOL Replication Error on Windows 2012 R2
Hi Guys
Recently we migrated one of our customer’s active directory domain controllers to a virtualized environment. During the DC migration my colleague noticed that the SYSVOL and NETLOGON folders are not replicating it’s contents from the existing domain controller. Thus he copied the contents manually. But after some time client started reporting error like;
- The Group Policy is not getting updated or Propagated to all the workstations / users.
- Logon Scripts stopped working.
Thus when we digged in to the problem we were able to track down the issue to DFSR based sysvol replication, Most importantly the old DC was not replicating for almost 1300 days approximately(Figure.1) The below event ID’s helped us to track down the issue:
So when we started troubleshoot we tried to ran the commands stated in the Eventviewer(refer attached file) but no avail.
Also we ran the below command
For /f %i IN (‘dsquery server -o rdn’) do @echo %i && @wmic /node:”%i” /namespace:\\root\microsoftdfs path dfsrreplicatedfolderinfo WHERE replicatedfoldername=’SYSVOL share’ get replicationgroupname,replicatedfoldername,state
Strangely the status on all the server showing 2 which is Initial Sync. (One of the reason for the problem) .Also in our MaxOfflineTimeInDays more than 1000 days. But
By default in Windows the is set to 60 Days. In our case we need to extend it upto 1800 days where there was an offset of more than 1000. so we ran the command to force the servers to allow the content freshness for more than 1000 days.
wmic.exe /namespace:\\root\microsoftdfs path DfsrMachineConfig set MaxOfflineTimeInDays=1800
(Do not forget to bring it back the original value of 60 Days)
But sill no avail. Then we decided to Authoritative restore of the SYSVOL folders. We ran the below command set which were extracted from the MS KB:https://support.microsoft.com/en-us/help/2218556/how-to-force-an-authoritative-and-non-authoritative-synchronization-fo)
Do this step on the PDC Emulator Role
Stop the DFSR Service
#net stop dfsr
Open the ADSIEDIT.MSC tool, modify the following DN and two attributes on the domain controller you want to make authoritative (preferably the PDC Emulator, which is usually the most up to date for SYSVOL contents):
CN=SYSVOL Subscription,CN=Domain System Volume,CN=DFSR-LocalSettings,CN=<the server name>,OU=Domain Controllers,DC=<domain>
msDFSR-Enabled=FALSE
msDFSR-options=1
Modify the following DN and single attribute on all other domain controllers in that domain:
CN=SYSVOL Subscription,CN=Domain System Volume,CN=DFSR-LocalSettings,CN=<each other server name>,OU=Domain Controllers,DC=<domain>
msDFSR-Enabled=FALSE
Stop the DFSR service on all the remaining controllers
#net stop dfsr
Force Active Directory replication throughout the domain and validate its success on all DCs.
Start the DFSR service set as authoritative:(On the PDC emulator)
#net start dfsr
You will see Event ID 4114 in the DFSR event log indicating SYSVOL is no longer being replicated.
On the same DN from Step 1, set:
msDFSR-Enabled=TRUE
Run the below command to force Active Directory replication throughout the domain and validate its success on all DCs.
#repadmin /syncall /AdP
Run the following command from an elevated command prompt on the same server that you set as authoritative:
DFSRDIAG POLLAD
You will see Event ID 4602 in the DFSR event log indicating SYSVOL has been initialized. That domain controller has now done a “D4” of SYSVOL.
Start the DFSR service on the other non-authoritative DCs.
#net start dfsr
You will see Event ID 4114 in the DFSR event log indicating SYSVOL is no longer being replicated on each of them.
Modify the following DN and single attribute on all other domain controllers in that domain:
CN=SYSVOL Subscription,CN=Domain System Volume,CN=DFSR-LocalSettings,CN=<each other server name>,OU=Domain Controllers,DC=<domain>
msDFSR-Enabled=TRUE
Run the following command from an elevated command prompt on all non-authoritative DCs (i.e. all but the formerly authoritative one):
DFSRDIAG POLLAD
————————————————————————————-
Voila we could see the replication started working and when we checked the replication status via the command
For /f %i IN (‘dsquery server -o rdn’) do @echo %i && @wmic /node:”%i” /namespace:\\root\microsoftdfs path dfsrreplicatedfolderinfo WHERE replicatedfoldername=’SYSVOL share’ get replicationgroupname,replicatedfoldername,state
it shows the status 4 (which is all synced)
I am listing the below articles which helped me in the initial troubleshooting.
http://www.itprotoday.com/windows-8/fixing-broken-sysvol-replication
http://kpytko.pl/active-directory-domain-services/non-authoritative-sysvol-restore-dfs-r
http://kpytko.pl/active-directory-domain-services/authoritative-sysvol-restore-dfs-r/
Good Luck
Muralee
Update 1 (29/01/2018) :
- Added the start and stop DFSR commands.
Hope you like it.. 