Pro-Exchange,Lync & Office 365
Belgian Microsoft Unified Communications Professionals
Microsoft Exchange Server, Microsoft Lync Server & Office 365
Exchange Server 2010 SP1 and Exchange Online (Office 365) Feature Comparison

If you're interested in a nice overview of the differences between Exchange 2010 SP1 (on-prem) and Exchange online (Office 365), take a look at the following TechNet-Wiki:

For a full product comparison, take a look at the Enterprise Service Descriptions for Office 365 here:

Posted 08-10-2011 3:26 by Michael Van Horenbeeck