Hi all,

I have tried OCS 2007 deployment in windows server 2008 R2.
But it throws an error while Preparing Forest.
It seems like one of the pre-requisite is not satisfied.

pre-requiisite is .

-Ensure that microsoft active directory service in microsoft

windows 2003 OS Native mode.

Regards,

Arun

What Functional Level is your domain/forest currently running at? 

1. To check open Active Directory Domains and Trusts MMC
2. Right click on the current domain and select Properties, this will show you the current Domain and Forest Functional Level 

Also look at the AD Requirements for OCS 2007 R2: http://technet.microsoft.com/en-us/library/dd572418(v=office.13).aspx

(Functional Level: Windows 2000 native/mixed is not supported and must be raised to a minimum of 2003)

Hi,

Did you solve the issue with the help of Michael provided?

You can also refer to the link about your issue:

http://support.microsoft.com/kb/982020/en-us

Best Regards,

Eason Huang