03-02-2006, 07:36 PM
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Look at this as wireless redirection as one step (to the BlackBerry infrastructure) and then wireless reconciliation as another step (the delivery to the handheld and status synchronization - read/unread/deleted).
Now, for an email to have the status reconciliation, it has to have the email on the Exchange mailbox (on the server) in order for it to have a source to base the handheld message status on - i.e., if the item is to be removed from the handheld, then the email will have to be present in the Deleted Items on the server for that user; if the item is marked as read, then it needs to be present in the user's Inbox on the server.
As far as I know, once a message is sent to the BlackBerry infrastructure for delivery to the handheld, it is there in pending status until it reaches the handheld or times out on the network (I believe this is 4-7 days or something like that). Once it reaches the handheld, it will then query the user's mailbox for the status update (mark it as read, leave it alone, delete it) ... if it has nothing to query as a source, then it simply leaves it alone (BES 4.1 will allow you to take this into account and have the messages removed if not source is found, aka "hard" delete support).
It's a good idea to have users remember this if they 1) are hardcore deleters who empty their Deleted Items ever minute or two, 2) have a secretary who manages their mailbox for them (there will be no source if they delete the item, so they'll need to move the message to the user's Deleted Items), 3) use a PST/Archive file for an ending point for messages, etc.
I believe the message is first 'redirected' (copied) by the BES service account from the user's mailbox to the BlackBerry infrastructure (where it then sits in the Pending status), and then is delivered from the infrastructure to the user's handheld over their carrier's APN (I believe that's correct - there are workflow diagrams within the Administration Guide that will have a definitive answer on that). Obviously, if its sitting out in the BlackBerry infrastructure, then there is nothing to update a status on.
Hope that helps.
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