Question
What is the procedure to upgrade Hosted Exchange 2010 servers that are integrated with POA from Service Pack 2 to Service Pack 3?
Answer
The upgrade procedure is the same as upgrade from Exchange 2010 SP1 to Exchange 2010 SP2, it is described in the following documentation articles:
http://download.pa.parallels.com/poa/5.4/doc/index.htm?fileName=67286.htm
http://download.pa.parallels.com/poa/5.5/doc/index.htm?fileName=67286.htm