The number of properties isn't what matters here. What matters is the source of the properties. If you succeeded in opening an object, the status bar should say the properties came from an object. If not, it'll say they came from the table. In this case, with just 6 properties, I'm guessing they came from the table.
Have you tried just navigating to the Calendar folder? There's more than one way to get to that folder. The option you're trying in MFCMAPI is just one way to get there.
Have you tried just navigating to the Calendar folder? There's more than one way to get to that folder. The option you're trying in MFCMAPI is just one way to get there.