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Title
Can you roll-back schema changes by restoring the Schema Operations Master with Recovery Manager -
Description
Can you roll-back schema changes by restoring the Schema Operations Master with Recovery Manager for AD?
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Resolution
No, you can not roll-back schema changes by restoring the Schema Operations Manager - either with Recovery Manager or using native tools (see http://support.microsoft.com/kb/241594).
The only way to restore the schema is to take the domain controllers for which you have backups off the network, restore those domain controllers from backup, demote all remaining domain controllers for which you do not have backups, place the restored domain controllers back on the network, and then promote any domain controllers that you demoted. However, any changes made after the backups were taken will be lost.
In short, the only way to roll-back changes to the schema is through a forest recovery, which you can use Recovery Manager for AD Forest Edition to automate and accelerate.