Backup and restore Domain Controller ( no pdc)

Hello all,
I have several DCs and i want to protect non PDC DCs with urBackup (image backup not only system state)
I have done some tests and after restoration , replication from pdc seems to work.

Any problems that someone might have seen ?

Did it once, the 2 DC broke apart! Even microsoft can’t make it sync again, had to install new. :frowning:
Conclusion: stop DC’s and image them as offline, start new after image. works flawless.