Wednesday, February 15, 2012

Verifying Forest and Domain Functional Levels of Windows Server 2008 Based Domain Environment

Sponsored Links

I am going to install Exchange Server 2010  on my Windows Server 2008 R2 based test domain. While setting up the environment for Exchange Server 2010 installation, we have to ensure that the Forest and Domain functional levels of Active Directory is set up properly to support Exchange Server. For successful deployment of Exchange Server 2010 the environment should meet minimum functional level below:

Forest: Windows Server 2003 functional level or higher.
Domain:  Windows Server 2003 functional level or higher.

This is how do we verify current functional levels of Forest and Domain:

1. Open ADUC (Active Directory Users and Computers)
2. Right click on the Domain name.
3. Click on 'Properties'
4. Check the functional levels  listed in the property window. In this example all functional levels are set to the highest, ie. Windows Server 2008 R2.


Its also possible to find out the functional level using command line.

Open CMD as elevated user and run below command:

Dsquery * CN=Partitions,CN=Configuration,DC=TRAINING,DC=com -scope base -attr msDS-Behavior-Version

note: Change 'TRAINING' to your domain name. 
 
In this example the output which I got is:

 msDS-Behavior-Version
 4

Here is how to verify functional level based on the output number you have got:

Forest:
 
 0 or not set=mixed forest functional level

1=Windows Server 2003 interim forest functional level

2=Windows Server 2003 forest functional level

3=Windows Server 2008 forest functional level

4= Windows Server 2008 R2 forest functional level

Domain:

0 or not set=mixed domain functional level

1=Windows Server 2003 domain functional level

2=Windows Server 2003 domain functional level

3=Windows Server 2008 domain functional level

4=Windows Server 2008 R2 domain functional level

blog comments powered by Disqus
Related Posts Plugin for WordPress, Blogger...