Have a windows 2008 r2 server with exchange 2010 version 14.1 build 218.15
looking to upgrade exchange 2010 to SP3 for some features and future upgrade to exchange 2013
all the roles are installed on a single box (no DAG)
looking for an update procedure and any tips or pitfalls
can I upgrade directly to SP3? or do i need to do any rollups, sp2, or hotfixes first? i've read something about a schema update? is this necessary, is it recommended to do a command line ('setup /PS'), or just run the installer?