Applying Exchange 2007 SP3 on Windows Server 2003 R2

I have Exchange Server 2007 and want to apply SP3.  Are there any concerns that I should be aware of?  of course, I don't want to blow up my Exchange server :)

I've read in a few places that I should apply SP2 first.  Other places, didn't agree.

Your thoughts?
OnsiteSupportAsked:
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BusbarSolutions ArchitectCommented:
nothing that I am aware of
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OnsiteSupportAuthor Commented:
busbar, so I could get away with a full OS backup and then launch setup with no issues?  Promise that I won't be awake all weekend repairing my exchange environment? LOL
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joerghermannsCommented:
Exchange SP are always cumulative, thus you can just install the latest one.
To make sure you can go back i would advise to:
- backup your system-state (even ntbackup is fine for that)
- shutdown exchange and copy your store-files manually aside
- restart exchange and do an online backup of your store with ntbackup

if you have time and possibility: make an image of the complete machine :-)

i personally never had a problem with those servicepacks
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sunnyc7Commented:
Pre-req:
Windows Installer 4.5

http://www.microsoft.com/downloads/details.aspx?FamilyID=5a58b56f-60b6-4412-95b9-54d056d6f9f4&displaylang=en

release notes here
http://technet.microsoft.com/en-us/library/ff607233(EXCHG.80).aspx

you dont need to install Sp2 prior.

Cant promise @ weekend - but if you face any issues, we are always here. Exchange queue @ EE is usually managed 24x7
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