I remember every once in awhile IT would have us regenerate our encryption keys, because the server would just *forget*. This was, IIRC, Cingular service through a dedicated corp exchange server, but it was almost a universal panacea for our Blackberry issues.

Ok, first when was the last time your BES talked to your BB, you can look on the BES and see last time connected, if it looks like they are talking but just no email, try resending the service book from the BES server, also just make sure you have "Wireless Email Sync" sent to true.

If they ahve not talked in awhile go ahead and do another Enterprise Activaion over the air. this will make sure your IT Policy and service book are in sync

just to make sure try re-registering the BB on the network (settings-Option-Advance options-Host Routing Table- Click the BB button and select "Regsiter Now" You should then get a message that your BB is registerd on the network, if not call sprint.

Let me know how it works out

I think you are correct. I have seen this before and cant remember if it was either calling the carrier or re-installing the firmware, but I do think calling sprint would be the way to go at this point.

I was not involved, but when my $emp first set up BES, it was a pain to get it talking at first. Not near as smooth as the vendor (BB direct and Verizon) promised it would be.