Problems updating exchange server 2010 in SBS 2011

I must be missing something.  I have a server running SBS 2011 which comes with exchange server 2010.  I look up the current software level by looking at the properties of the server object in the exchange management console and it show me that we are at version 14.3 build 123.4.  I can see where there are three service packs for exchange server 2010, SP1, SP2 and SP3.  It looks like these patches want to reinstall exchange server completely.  Do I need to do SP1 then the other two to follow or can I install SP3 and skip the first two?  It sure looks like it is a fresh install which makes me a little nervous.
captjcretAsked:
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Gareth GudgerCommented:
14.3 means it is already at Service Pack 3. So you are good. 14.3.123.4 is 2010 SP3 with no rollups.

What you need to look at instead is the rollups for Service Pack 3.

Rollup 7 is the latest.
http://support2.microsoft.com/kb/2961522

That will take your build to 14.3.195.1

But to answer your other question. If you were at an older version, you could go directly to SP3. SP3 includes all previous hotfixes and service packs. Rollups are service pack specific though. So rollup 7 for Service Pack 3, requires SP3 first.

Side Note: This all changed in Exchange 2013, by the way.
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