GroupCalendar 1.6.86 descriptions Up until now it was almost impossible to get a good overview of your coworker calendars & appointments integrated with Outlook. GroupCalendar is an easy to install Outlook add on which solves that problem effectively & flexibly. In addition to allowing group viewing of calendars GroupCalendar also allows you to create & edit appointments on behalf of others. All of these features are available using nothing more then a peer to peer network or LAN no server software is required.