As customers are upgraded or sign up for the latest version of Office 365 for business, they may notice some changes in their recipient and organization management experience. For instance, we now allow the Organization and Hybrid Migration management experience to be initiated from the Exchange Administration Center (EAC) in Exchange Online. This allows you as the administrator to take advantage of many of the enhancements that were added to the migration and organization management experience. The good news is you can do this without having to upgrade your on-premises Exchange 2010 Hybrid server to Exchange 2013.
Read the complete blog at http://blogs.technet.com/b/exchange/archive/2013/08/29/hybrid-mailbox-moves-and-emc-changes.aspx
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