The Exchange server hosting the Availability Service URL (ASURL) doesn't meet the minimum version requirement to support ...

The Exchange server hosting the Availability Service URL (ASURL) doesn't meet the minimum version requirement to support hybrid deployment with Office 365.{0}Server version must be Exchange Server 2010 SP3 or higher. See the following TechNet topic for information about hybrid deployment prerequisites: http://go.microsoft.com/fwlink/p/?LinkId=279533