Hello, Are there any guidelines for planning capacity for Active Sync? Moving 2000 Blackberry users to ActiveSync could save money but naturally don't want to overwhelm our existing servers. Thanks

This is an article I like: http://technet.microsoft.com/en-us/library/ff803560.aspx White Paper: Understanding the Relative Costs of Client Access Server Workloads in Exchange Server 2010 Size the servers correctly and in the proper ratio of CAS to Mailbox ( 3 CAS : 4 MBX Processor Cores ) and you wont go wrong: http://technet.microsoft.com/en-us/library/dd346699.aspx http://blogs.technet.com/b/ucedsg/archive/2009/06/29/high-level-exchange-2010-architecture.aspx