Cannot dcpromo Windows 2008 server 1

[LastWords]

Hi

I have a Windows 2008 r2 64 bit server I am trying to promote to be a domain controller. However when I run dcpromo I get an error message after I have clicked next when selecting the existing domain.

It says "...you must first prepare the forest by running adprep/forestprep.." However if I run adprep/forestprep on the existing dc's nothing happens. The other two dc's are Windows 2008 sp2, does this matter?

How can I get adprep to run properly?

Thanks

by Lastwords,

Maentwrog (n.Welsh): Celtic word for a computer spelling mistake.

 

[mspain]

Run forestprep from the R2 disc on the Schema Master?

 

[kmcferrin]

Mspain is correct. When you run the forestprep you are updating the AD schema to be compatible with 2008 R2 domain controllers. This has to be done from a 2008 R2 source. Running it from a downlevel DC will not be sufficient.

________________________________________
CompTIA A+, Network+, Server+, Security+
MCTS:Windows 7
MCSE:Security 2003
MCITP:Server Administrator
MCITP:Enterprise Administrator
MCITP:Virtualization Administrator 2008 R2
Certified Quest vWorkspace Administrator

 

[LastWords]

Yep that fixed it, thanks so much.

by Lastwords,

Maentwrog (n.Welsh): Celtic word for a computer spelling mistake.