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Exchange 2010 and forest/domain functional levels

    Question

  • Currently running mixed mode between 2003/2008 R2. I have seen the exchange 2010 matrix for funtional levels.

    Are there any known issues when installing Exchange 2010 under one forest/domain functional level (ie. 2k3 mixed) then raising the functional level later (possibly months when we can configure all DCs to run at Windows 2k8 R2 functional level)?

    From my understanding the Schema prep and AD prep done by Exchange 2010 are one-time. In addition functional levels do not impact applications outside of the domain group (DCs) and are cumulative additions rather than removals. Has anyone encountered such a situation that Exchnage has broken when changing forest functionality. Lastly, is there a document that specifies impact, if there is one?

    Sunday, January 30, 2011 2:58 AM

Answers

  • As long as you meet the requirements for Exchange 2010 to install, changing the mode up doesn't affect Exchange in any shape or form, because Exchange doesn't care.

    Simon.


    Simon Butler, Exchange MVP
    Blog | Exchange Resources
    • Proposed as answer by Dave Stork Monday, January 31, 2011 10:15 AM
    • Marked as answer by altria92 Monday, January 31, 2011 8:21 PM
    Monday, January 31, 2011 10:13 AM

All replies

  • As long as you meet the requirements for Exchange 2010 to install, changing the mode up doesn't affect Exchange in any shape or form, because Exchange doesn't care.

    Simon.


    Simon Butler, Exchange MVP
    Blog | Exchange Resources
    • Proposed as answer by Dave Stork Monday, January 31, 2011 10:15 AM
    • Marked as answer by altria92 Monday, January 31, 2011 8:21 PM
    Monday, January 31, 2011 10:13 AM
  •  LOL 
    I Agree, i like the last part "because Exchange doesn't care."
    Gulab | Skype: gulab.mallah
    Monday, January 31, 2011 10:16 AM
  • Thanks! I absolutely agree but is this documented anywhere?

     

    Monday, January 31, 2011 8:21 PM
  • Thanks! I absolutely agree but is this documented anywhere?

     


    I doubt it.
    Microsoft don't document every scenario. If you can't find anything to say it shouldn't be done (because you will not) then it is fine. The only thing Exchange cares about is the minimum level, and as you can't go back, going up isn't an issue.

    Simon.


    Simon Butler, Exchange MVP
    Blog | Exchange Resources
    Monday, January 31, 2011 9:17 PM