Exchange 2007 SP3 upgrade in environment with Exchange 2010 SP3 already installed.

Hello All,



I have an Exchange environment that started life as a 2007 environment and has been upgraded to Exchange 2010 SP3. We are now planning to go Hybrid with Office 365 and  before we do this we will need to upgrade the Exchange 2007 servers to SP3 RU11.



As it stands, our Exchange 2007 servers are Service Pack 2 and our Exchange 2010 servers are Service Pack 3 which means that all of the schema updates for SP3 have been applied to the environment.

My current schema version is 

Exchange 2010 SP314734


Does the schema version 14734 incorporate all the schema attributes etc. from the Exchange 2007 SP3 version below

Exchange 2007 SP314625


I am assuming so, seeing as though we have applied Exchange 2010 schema updates in order to have the 2010 servers in the environment.



So having said all that, am I able to apply the service pack 3 and Rollup 11 to the existing Exchange 2007 servers or do I need to do something else in order to upgrade them?



Thanks in advance.