After setting up the handset (I was using another phone for a while), not sure why periodically an error message will flash saying that Encryption key should be regenerated?

I have sent Service Books from Tmo's website and also from handset. Received all registration messages. I can receive and send emails, and can surf the web. Everything seems to be fine, except for the periodic flashing up of the error message.

I tried searching for this issue but seemed all posts were from people on BES and I'm on BIS.

Also I have no Redirector on Desktop Mgr.

Thanks for any help.

Is the device used? If so, it may have been previously used on a BES server and not removed. The BES server may still be trying to send messages to the handheld.

Device was not used, but before I switched to another phone, it was on BES, and now I'm using it for BIS. Anything I can do?