Installing additional domain controller on the
windows 2008 Server SP2.
To perform this procedure, you must be a member of the Domain Admins group in the domain in which the domain
controller is being installed.
To install a domain controller in an existing domain by using the Windows interface
1. Open Server Manager. Click Start, point to Administrative Tools, and then click Server Manager.
2. In Roles Summary, click Add Roles.
3. If necessary, review the information on the Before You Begin page, and then click Next.
4. On the Select Server Roles page, click the Active Directory Domain Services check box, and then
click Next.
5. If necessary, review the information on the Active Directory Domain Services page, and then click
Next.
6. On the Confirm Installation Selections page, click Install.
7. On the Installation Results page, click Close this wizard and launch the Active Directory Domain
Services Installation Wizard (dcpromo.exe).
8. On the Welcome to the Active Directory Domain Services Installation Wizard page, click Next.
9. On the Operating System Compatibility page, review the warning about the default security settings
for Windows Server 2008 and Windows Server 2008 R2 domain controllers, and then click Next.
10. On the Choose a Deployment Configuration page, click Existing forest, click Add a domain
controller to an existing domain, and then click Next.
11. On the Network Credentials page, type the name of any existing domain in the forest where you plan to
install the additional domain controller. Under Specify the account credentials to use to perform the
installation, click My current logged on credentials or click Alternate credentials, and then click
Set. In the Windows Security dialog box, provide the user name and password for an account that can
install the additional domain controller. To install an additional domain controller, you must be a member
of the Enterprise Admins group or the Domain Admins group. When you are finished providing credentials,
click Next.
12. On the Select a Domain page, select the domain of the new domain controller, and then click Next.
13. On the Select a Site page, select a site from the list or select the option to install the domain controller in
the site that corresponds to its IP address, and then click Next.
14. On the Additional Domain Controller Options page, make the following selections, and then click
Next:
1. DNS server: This option is selected by default so that your domain controller can function as a
Domain Name System (DNS) server. If you do not want the domain controller to be a DNS
server, clear this option.
Note
If you select the option to install DNS server, you might receive a message that indicates that a DNS
delegation for the DNS server could not be created and that you should manually create a DNS delegation to
the DNS server to ensure reliable name resolution. If you are installing an additional domain controller in
either the forest root domain or a tree root domain, you do not have to create the DNS delegation. In this
case, click Yes and disregard the message.
2. Global Catalog: This option is selected by default. It adds the global catalog, read-only directory
partitions to the domain controller, and it enables global catalog search functionality.
15. On the Location for Database, Log Files, and SYSVOL page, type or browse to the volume and folder
locations for the database file, the directory service log files, and the system volume (SYSVOL) files, and
then click Next.
16. On the Directory Services Restore Mode Administrator Password page, type and confirm the restore
mode password, and then click Next. This password must be used to start AD DS in Directory Service
Restore Mode (DSRM) for tasks that must be performed offline.
17. On the Summary page, review your selections. Click Back to change any selections, if necessary.
18. Installation will start.
19. On the Completing the Active Directory Domain Services Installation Wizard page, click Finish.
20. Click Restart now.
21. Verify if Additional domain controller is added in Default Site.
22. Check Replication Status
23. Add additional domain controller IP address to every exchange server’s IP configuration.
