The annoying thing about the new SP1 update for 2011 is that it ties Outlook 2011 into Exchange 2010 only, it works for 2007 servers but once you install SP1 you can't create rules anymore if you're connected to a 2007 server![]()
The only reason why only Exchange 2010 SP1 is supported, is that Microsoft implemented the necessary changes to EWS only in Exchange 2010 with SP1.