Sharing indivudual calendars with groups

Sharing indivudual calendars with groups

I want to make sure that each member of our team is sharing calendars with each other. We use it to track who is in and out of the office at any one time. I thought by sharing calendars with a group, all members of that group could then subscribe to the individual calendars. I tried this, and asked my colleagues go to the calendar and subscribe to > group. They could see the groups they were members of and the names of the shared to group calendars with a subscribe button, but when clicked the subscribe button came up with a messge of "undefined" and nothing else happened.

Is there a way around this. Otherwise, I have to rely on each of the 12 people on my team sharing their calendars individually with the 12 other people on the team? There seems a lot more room for error and annoyance this way.


Thanks
Sarah