Hello,

We have users on BES 5.0, and after an exchange 2003 reboot or some sort of power loss, those users on that exchange server loose contact with the BES, and stop receiving email on their blackberries.

This is fixed by rebooting the BES. Does anyone know why this happens, and how to prevent is so I don't have to keep rebooting the BES every time another exchange server is rebooted??

Thanks!

This is not uncommon, especially with Exchange 2003. A restart of the Dispatcher service is usually a better option than rebooting the entire server. This forces the Messaging Agents to rescan mailboxes for changes, thus reestablishing connection to Exchange.

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First and foremost ... any time you restart Exchange ... restart BES. Any good BES admin would recommend that as a good process.

Why does this happen? The BES establishes MAPI connections to Exchange and when Exchange goes down those threads don't properly close ... they hang. The threads try to recover but if they can't eventually the BES will effectively stop trying and drop the connections. The only way to get them back is to restart the BES. Restarting the dispatcher alone *may* not fix it if the 10 in 24 rule (default setting) kicks in where an agent restarts 10 times within 24 hours.

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