Aggregated Events Missing from SharePoint 2010 Calendar Overlay
SharePoint 2010 has a great aggregation feature that allows you to roll up multiple calendars into a single presentation; it’s called Calendar Overlay. If you take a standard calendar web part and go to the Ribbon there is a button labeled ‘Calendar Overlay’. Click it and you can add new calendars (other SharePoint calendars or even Exchange-based calendars). You can even color code each calendar so the events stand out. All of them shown in a single, automatically updated calendar presentation. Good stuff!
One thing I did notice with calendar overlays, however, is that when I drop that calendar web part on a page the aggregated calendar events do not appear automatically. If I go into edit mode and change the view of the web part to calendar then all events “magically” appear. Feature? Bug? Not sure but I know it works for me…