2 DC's Out of Sync

[swiftysw1]

Hi,

For some reason both of my DC's are out of sync.

 

We have one DC showing my recent changes and another that isnt...

 

What can I do?

 

Thanks

Simon W

[sister_annex]

What OS are you running?

 

Few things I would start with:

 

Have you checked that replication is stable:

repadmin /showrepl
repadmin /replsummary

 

Is the time correct on both servers? your PDC should be syncing with a time source and your others should be syncing to your PDC

[swiftysw1]

Server 2012. (Should have said Lol)

Yes times are spot on..

[HPlum78]

https://www.microsoft.com/en-us/download/details.aspx?id=30005

 

Dcdiag and repadmin but in all honesty use the tool above....

 

Oh and first guess dirty shut down?

Edited June 6, 2019 by HPlum78

[swiftysw1]

Can I repair with this tool?

Cant see it?

[HPlum78]

No it's not a tool that can repair any issues more for exposing an issues to hell you focus on any errors and use other tools to fix them.

[HPlum78]

Take it that its found an issue? If so post it and we maybe able to be able to help.

[swiftysw1]

Hi Here is the Error.

The Replication operation encountered a database error

[HPlum78]

Any event ids?

[swiftysw1]

HI This is the error..

 

https://www.dropbox.com/s/x3jrfdm3t4hd0z7/Capture.JPG?dl=0

 

When I click on it it states

Replication error 8451 The replication operation encountered a database error | Microsoft Docs

 

 

 

 

 

Replication error 8451 The replication operation encountered a database error

[colly72]

This might help in narrowing down the issue:

 

https://support.microsoft.com/en-gb/help/2645996/active-directory-replication-error-8451-the-replication-operation-enco

[HPlum78]

So to sum up the link provided enable additional NTDS logging via the Reg key, then it's a case of looking at the logs to determine whats going on.

[CCCSecMan]

Have you tried rebooting each domain controller in succession?

[PotNoodleTech]

Have you checked the time on each DC? They need to be close (preferably identical).