God bless you... Checking the event log helped me resolve the issue!!
Here was the event:
Quote:
Event Type: Warning
Event Source: BlackBerry Dispatcher BES
Event Category: None
Event ID: 20000
Date: 8/22/2011
Time: 12:35:18 PM
User: N/A
Computer: BES
Description:
{USER NAME} Old OTAKEYGEN packet is cancelled, Tag=1603631
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I googled the error description and turns out this is a problem that occurs where the mailbox has a forwarding rule on it. Even though mail is delivered to this box AND another box, it apparently causes issues. Removing the forwarding rule resolved the problem.
Thank you!!!