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Raising Domain Functional Level

I'm getting ready to upgrade to Exchange 2010 from Exchange 2003 and right now my domain and forest functional levels are Windows 2000 native mode. Do I need to raise the domain and forest functional level to have exchange 2010 work? Will raising these levels cause any issues with my domain controllers and users?

Plano Tech

Here is a great article:
http://support.microsoft.com/kb/322692

Mike Kline

The exchange supportability matrix is a great place to start

http://technet.microsoft.com/en-us/library/ff728623.aspx

As you can see you will need to get to 2003 functional mode for AD for exchange 2010. At this point I'd try to go to 2008 but 2003 will work.

Thanks

Mike

wmccann09

ASKER

Are there any risks switching over. Is this something I can run during working hours or is it an after hours fix? Will user be affected at all?

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abhijitwaikar

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wmccann09

ASKER

I have two Windows Server 2008 domain controllers and one Windows Server 2003 SP2 domain controller. I can only raise the level to Windows 2003 correct?

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abhijitwaikar

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wmccann09

ASKER

I've updated the DFL. Where do I update the FFL?

Mike Kline

You raise FFL in domains and trusts also http://technet.microsoft.com/en-us/library/cc730985.aspx

Thanks

Mike