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?