Can Activesync do this?

[misfitmallard]

Not to make this sound to simple, and you may have already tried this, but.....

Why don't you just make a new e-mail account with-in your Outlook on your desktop for your POP3? Create the new e-mail account, sync the phone and then select the e-mail folders in the e-mail options menu with-in Active Sync. This should push the messages to you through the exchange server.

[Lucky13MN]

Exchange Server only syncs Exchange related items, any POP or IMAP added into Outlook wouldn't be included because they are just add-on accounts.