2 domain controllers (2008 R2) were not properly recovered from images as images were taken/recovered in 20 min difference.
repadmin /showutdvec * dc=domain,dc=com does not show any problem.
USN shown on each DC for its partner is the same or higher then partners one for itself.
No errors on both DCs in Directory Service log.
My worry is "Undetected USN Rollback" which results in undetected divergence where USNs f.e. 2000 through 2100 are not the same between two domain controllers.
Is any way to determine that?