Installing SP1 on windows 2008R2 DC

Quick question. i have a windows 2008R2 domain controller that i added to my current 2003 AD recently. One thing i missed before doing to dcpromo was installing SP1 on the R2 machine.

We have a pretty simple environment. currently 3 2003 DC's and 1 2008 DC. Forest and domain are in 2003 mode. One forest and one domain. If i update to SP1 on the R2 machine, does this change a lot of AD stuff that i should be aware of, especially with 2003 DC's in the mix?

The R2 machine doesnt have any other software installed (except mcafee viruscan). It's stricly a DC. I've also transferred all FSMO roles to it.
LVL 2
msidnamAsked:
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Lee W, MVPTechnology and Business Process AdvisorCommented:
There are no schema updates in SP1 so there are no direct updates to AD.
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Neil RussellTechnical Development LeadCommented:
As far as I am aware it will have no impact at all on what you have installed in terms of your environment.
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Thomas-NorwayCommented:
I have cthe same server environment as you. I have just done exactly the same. It went just fine. No changes in ad.  No problem.
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netballiCommented:
As far as my experience goes SP1 will only upgrade windows 2008 R2 server and services

you can also read further about it from below link,

http://technet.microsoft.com/en-us/library/ff817646(WS.10).aspx
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