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Roll Back / Lower the Domain Functional Level

TBRAYS

Summary: 6 item(s). 5 succeeded, 1 failed.
Elapsed time: 00:00:55

Organization Prerequisites
Failed
Error:
The forest functional level of the current Active Directory forest is not Windows Server 2003 native or later. To install Exchange Server 2010, the forest functional level must be at least Windows Server 2003 native.
Warning:
Setup is going to prepare the organization for Exchange 2010 by using 'Setup /PrepareAD'. No Exchange 2007 server roles have been detected in this topology. After this operation, you will not be able to install any Exchange 2007 server roles.

Elapsed Time: 00:00:28

Languages Prerequisites
Completed
Elapsed Time: 00:00:04

Hub Transport Role Prerequisites
Completed
Elapsed Time: 00:00:06

Client Access Role Prerequisites
Completed
Elapsed Time: 00:00:05

Unified Messaging Role Prerequisites
Completed
Elapsed Time: 00:00:05

Mailbox Role Prerequisites
Completed
Elapsed Time: 00:00:05

I really need some assistance to rolling it back from Window Server 2008 R2 to Window Server 2008

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Comments

Devilsbane

I didn't know that you could...

earweed

Thought I'd bump this post up, I want to see if anyone knows how myself

dynamik

Forest recovery is the only way: Planning for Active Directory Forest Recovery

astorrs

TBRAYS wrote: »

I really need some assistance to rolling it back from Window Server 2008 R2 to Window Server 2008

Why do you think this is necessary? The error message you show would lead me to believe otherwise.

As for how to do it, dynamik linked to the procedure, but you are looking at doing a full on restore from backup and rebuilding your entire ADDS structure forest-wide - unless this is a home lab or you have a couple dozen machines - it's almost never worth it - it's to be used after catastrophic problems/corruption/etc.

TBRAYS

I resolved the issue by entering a certain command in the powershell, you can only lower it from R2 to 2008.

snadam

Out of curiosity, did it resolve the issue?

earweed

I didn't know there was any way to lower the functional level

Devilsbane

From what is sounds like, we aren't dropping a functional level, we are dropping from R2 to "R1" but I didn't know you could do that either.