we have a BES with 90 Blackberry's connected to it... Recently one of our users reported that he doesn't seem to receive any e-mails all day then, all of a sudden, he'll get a bunch of e-mails at the same time that he's received in his Exchange account throughout the day.
I checked his "don't deliver when handheld connected" setting and it was OK, but he says this happens even if the device isn't connected to the PC anyway.
He has a full GPRS signal all throughout the day when it's not receiving anything.
Also, when he tries a lookup he gets "lookup failed"
None of these problems are affecting any of our other users (trust me, this lot are real quick to let you know when they have a problem with their Blackberry!!).
I've resent the service book. I've even killed and recreated his Blackberry, (even deleted his account from the BES) but the problem remains.
I haven't seen any errors in the server logs.
In the BES application it shows his device is talking to the network, but it says "Last Forward time" as a few hours ago - when he received his last message, even though I've sent him a few tests.
This was first reported last week and nothing I've done has got him working again.
A faulty device, perhaps?