recently my customer migrated from local Exchange on SBS 2003 server to external mail provider (me). Main reason was unreliable SBS 2003, where Exchange was delaying messages in/out from time to time, every month or so, which drove them crazy.
Ok, I configured really excellent and secure IMAP accounts for them, having SSL tunnel for incoming and outgoing mail, with passive off-site full accounts backup on secondary server.
Well, the PROBLEM is that with Outlook 2007 everything works really great, but with Outlook 2003, which they have installed, there are some problems:
1.) SENT MAIL
Since IMAP cannot be Outlook's only one account, Outlook 2003 saves SENT messages in default Mailbox's SENT folder. Outlook 2007 has simple setting, which enables you to select sent items location, but 2003 does not.
I wanted to create a rule, but rules are stupid and I can only "copy" sent items to IMAP's SENT folder, and beside that, all sent items are marked as "Unread", which is annoying.
2.) DELETED ITEMS
Deleted items are only marked for deletion, meaning that they show just striked thru, but they stay in INBOX. Again, Outlook 2007 has a checkbox, saying "Purge items when switching folders", but Outlook 2003 seems not to have any simmilar setting, so deleted items are kept in INBOX folder until I exit and reopen Oultook.
Actually, I'd be most happy if I could remove Exchange acocunts from users Outlooks, but they need to keep common Calendars functionality, so I left Exchange accounts untouched.