Exchange 2007 upgrade to sp3

I have an exchange environment with 3 servers.  1 is running Exchange 2003 and 2 are running exchange 2007 sp2.  One of those servers is a new server with no real accounts on it.  

I'm planning on installing SP3 and had a question.  Can I go ahead and install sp3 on the server with no mailboxes without it impacting the others.  Essentially I want to upgrade the first server during normal business hours, and not during a planned outage.  Will the upgrade make any changes to the other server?  
nohman27Asked:
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RobertPartenCommented:
Last I checked installing SP3 doesn't really do anything other than apply some updates to it and that is all.
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nohman27Author Commented:
It worked without any problems.  It did say it would update the schema, but it didn't impact any of the live mailboxes.
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