I haven't been able to confirm anything yet, but a second Blackberry started to use IMAP idle on our server last night. This one is on T-mobile. (The first is on Verizon). The BIS server connects from a different IP on each Blackberry. Is it possible RIM is rolling out to their BIS servers slowly? We have made no changes to the BIS configuarations or our mail server. Imap idle started sponataneously.
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