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I need to run Windows Service Pack 1 for Windows Server 2008 R2 (not sure if SP2 is out yet). &nbsp;Is it better to stop all Exchange services and SQL services BEFORE running the Windows OS service packs? &nbsp;AND in order to run the SPs on Exchange, the mail services HAVE to be running?<br />
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We are in disagreement as to which is safer and appropriate.
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I need to run Windows Service Pack 1 for Windows Server 2008 R2 (not sure if SP2 is out yet).  Is it better to stop all Exchange services and SQL services BEFORE running the Windows OS service packs?  AND in order to run the SPs on Exchange, the mail services HAVE to be running?

We are in disagreement as to which is safer and appropriate.

Running Windows Service Packs on Exchange 2010

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.