troubleshooting Question

Unable to install secondary domain controller

Avatar of Ram Kumar Chellam
Ram Kumar ChellamFlag for Saudi Arabia asked on
Windows Server 2003Active DirectoryWindows Server 2008
10 Comments2 Solutions949 ViewsLast Modified:
Dear All,

Good Day,

I have a 2003 Enterprise Edt. 32bit server as my primary DC and want to install a 2008 r2 Enterprise 64bit server as a secondary DC with a child domain.

When I run dcpromo.exe and follow the steps up to where it wants me to name the new child domain and click next, I get this error: To install a domain controller into this Active Directory forest, you must first prepare the forest using "adprep /forestprep". The Adprep utility is available on the Windows Server 2008 R2 installation media in the \support\adprep folder.

and follow the below link:

then its gives me the below error, could you please help me how to solve this issue ( coz before i had a backup domain controller Win Server 2003  Enterprise Edt. 32bit but now its no more its not working and i don't have backup also)

Error Message:

I:\>\support\adprep\adprep32.exe /forestprep


Before running adprep, all Windows 2000 Active Directory Domain Controllers in t
he forest should be upgraded to Windows 2000 Service Pack 4 (SP4) or later.

[User Action]
If ALL your existing Windows 2000 Active Directory Domain Controllers meet this
requirement, type C and then press ENTER to continue. Otherwise, type any other
key and press ENTER to quit.

Adprep was unable to extend the schema.
The schema master did not complete a replication cycle after the last reboot. Th
e schema master must complete at least one replication cycle before the schema c
an be extended.
[User Action]
Verify that the schema master is connected to the network and can communicate wi
th other Active Directory Domain Controllers.  Use the Sites and Services snap-i
n to replicate between the schema operations master and at least one replication
 partner. After replication has succeeded, run adprep again.

Please help me how to solve this issue.

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