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Sunday, May 11, 2008

How to Install Active Directory Using Restored Backup Media

By installing Active Directory from restored backup media, you can reduce the replication traffic that is initiated during the installation of an additional domain controller in an Active Directory domain. Reducing the replication traffic reduces the time necessary to install the additional domain controller. The procedures in this task are particularly useful for installing domain controllers in remote sites.

To install Active Directory from restored backup media:
1. Click Start, click Run, type dcpromo /adv, and then press ENTER.
2. In the Active Directory Installation Wizard, select Additional domain controller for existing domain.
3. Select From these restored backup files, and point to the same location where you restored the system state data.
4. If the domain controller whose system state backup you are using is a global catalog server, the Active Directory Installation Wizard asks you whether you want this server to also be a global catalog server.
5. Give appropriate credentials for the operation.
6. Enter the domain of the new domain controller. This domain must be the domain of the domain controller whose system state backup you are using.
7. Complete the remaining pages of the Active Directory Installation Wizard.

Dcpromo.exe will install Active Directory using the data present in the restored files, which eliminates the need to replicate every object from a partner domain controller. However, objects that were modified, added, or deleted since the backup was taken must be replicated. If the backup was recent, the amount of replication required will be considerably less than that required for a regular Active Directory installation.

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