Here is a link to a great talk Konstantin Ryvkin gave at the Redmond Interoperability Protocols Plugfest this past June on Exchange in Office 365 Dedicated:

http://channel9.msdn.com/Events/Open-Specifications-Plugfests/Redmond-Interoperability-Protocols-Plugfest-2013/Exchange-Office-365-Dedicated

I’ve been working with Kostya on a number of partner engagements lately.  This is a great depth understanding of Exchange Online in Office 365 Dedicated, how it is delivered to customers, and what that means for partner solutions. Dedicated is a very unique beast as compared to Exchange on-premises or even Exchange Online as part of Office 365 Multitenant/Shared. If this is a target environment for your solution, you should watch this presentation.

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