I have a regular calendar and alternate calendar that I sync with Outlook 2010, iPad and iPhone. The to do bar shows no appointments. How can I get the sync'd calendar appoints to show in the upcoming appointments?
Unfortunately the To-Do bar only displays appointments from the default Outlook calendar. It will not display any information from any secondary calendar in the To-Do bar. I have not been able to find official confirmation for this, but you can see this or this thread at Microsoft Community.