03-13-2006, 05:46 PM
Join Date: Feb 2005
Location: SE PA.
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BIS is Blackberry Internet Server
BES is Blackberry Enterprise Server
Basically, the main difference is cellular carriers offer the BIS for their BB clients and companies/corporations offer the BES. The BES can provide a more restrictive environment for IT departments and their users. Also, the BES can provide wireless sync for tasks/calendar apps on the BB.
The Desktop Redirector is called just that. It provides a user (with MS Exchange server) to manage the email in a user's outlook mailbox.