Palm Treo 755P User Manual page 260

When synchronization is complete, a message appears at the top of your device screen. Be
patient; synchronization may take a few minutes.
Note:
252
If you use Microsoft Exchange ActiveSync®, your email, contacts, and
calendar information synchronize directly with your company's
Exchange server. This information synchronizes wirelessly with the
server; it is not updated when you synchronize directly with your
computer. See "Getting Messages From Your Corporate Microsoft
Exchange Server Onto Your Device" on page 130. Your tasks and memos
continue to synchronize with Palm Desktop software or Microsoft
Outlook, depending on which desktop application you use.
Section 6A: Managing Files