Operation Manual

301 Copyright © Acronis International GmbH, 2002-2015
 Exchange 2007: http://technet.microsoft.com/en-us/library/aa997694(v=exchg.80)
 Exchange 2003: http://technet.microsoft.com/en-us/library/bb124427(v=exchg.65)
2. Recover the database files to the RDB/RSG folder structure. For information about recovering
database files, see "Recovering Exchange Server database files from a disk backup" (p. 299).
3. Mount the recovery database. For information about mounting databases, see "Mounting
Exchange Server databases" (p. 300).
4. Proceed as described in the following articles:
 Exchange 2010: http://technet.microsoft.com/en-us/library/ee332351
 Exchange 2007: http://technet.microsoft.com/en-us/library/aa997694(v=exchg.80)
 Exchange 2003: http://technet.microsoft.com/en-us/library/aa998109(v=exchg.65)
11.4 Recovering Active Directory data
Active Directory recovery differs depending on the type of recovery required.
This section considers the following disaster scenarios:
 A domain controller is lost but other domain controllers are still available. See “Recovering a
domain controller (other DCs are available)” (p. 301).
 All domain controllers are lost (or there was only one). See “Recovering a domain controller (no
other DCs are available)” (p. 302).
 The Active Directory database is corrupted and the Active Directory service does not start. See
“Restoring the Active Directory database” (p. 303).
 Certain information is accidentally deleted from Active Directory. See “Restoring accidentally
deleted information” (p. 304).
11.4.1 Recovering a domain controller (other DCs are available)
When one of the several domain controllers (DCs) is lost, the Active Directory service is still available.
Therefore, other domain controllers will contain data that is newer than the data in the backup.
In these cases, a type of recovery known as nonauthoritative restore is usually performed.
Nonauthoritative restore means that the recovery will not affect the current state of Active
Directory.
Steps to perform
If the domain has other domain controllers, you can perform nonauthoritative restore of a lost
domain controller in either of these ways:
 Recover a domain controller from a backup by using a bootable media. Ensure that there is no
USN rollback problem (p. 304).
 Recreate a domain controller by installing the operating system and making the machine a new
domain controller (by using the dcpromo.exe tool).
Both operations are followed by automatic replication. Replication makes the domain controller
database up-to-date. Just ensure that the Active Directory service has started successfully. Once
replication completes, the domain controller will be up and running again.
Recovery vs. re-creation
Re-creation does not require having a backup. Recovery is normally faster than re-creation. However,
recovery is not possible in the following cases: