Apple Mail and/or Exchange Server email problem

[Gregg Dinse]

Hi,

At work I use Apple Mail on a Mac Pro running Tiger (10.4.11).  My  
account had been an IMAP account, but about 2 weeks ago I switched it  
to an Exchange account, since virtually everyone at work uses  
Exchange and I believe they wanted the rest of us to switch.  Today I  
noticed a problem, but I do not know whether it is related to Apple  
Mail, Exchange, or both (or neither).

I always CC myself on emails that I send.  Yesterday I sent an email  
to a colleague just before I left work.  This morning I looked for  
that message in my Inbox (in Apple Mail) and it was not there.  I  
looked to see if I had already filed it on my mac, in the mailbox for  
that colleague, but it was not there either.  Then I looked in the  
Inbox on our Exchange server and I could not see it there.  Finally,  
I looked in the Sent mailbox in Apple Mail and there it was.  Sure  
enough, I had CC'd myself like usual.  Does anyone have any idea why  
I did not get a copy?  Even if I did get a copy on my mac and either  
accidentally deleted it (unlikely) or accidentally misfiled it (less  
unlikely, but I looked in neighboring mailboxes), why was it not on  
the Exchange server?

I have no idea how many other emails I might be missing (maybe none,  
but who knows).  If this is an isolated incident, then it's no big  
deal, but if this will be (or has been) an ongoing problem, then it  
is a big deal.  Does this description of the problem ring any bells  
with anyone?  I'm open to suggestions, such as going back to an IMAP  
account.  Thanks,

Gregg