I have Outlook 2007 - exchange account.
I do use a BB.
I have noticed some calendar entries disappearing. They are always the ones
for meetings I have sent myself for non-recurring events. They remain in the
invitees' calendar.
After some investigation I believe it only happens when I updare an
invitation that was sent to an email alias I'm part of.
E.g. If I update a meeting request for a meeting I created an hour ago and
sent to the email aalias "UK_All" - which I'm part of - then the meeting gets
removed from my calendar immediately.
Any idea what's wrong?

I have a rule that says that if I receive an email sent by myself (like it
would happen if I sent an invite to "UK_All") then to move that email to the
'Sent' folder. Could that be the problem?

Thanks