To create a calendar group in Microsoft Outlook:

1. Open Outlook and click on ‘Calendar’.
2. Click the ‘Home’ tab and select ‘New Group’.
   
3. Enter a name for the group and click ‘OK’
4. From the ‘People’ tab, select ‘Add Members’.
5. Select members from the list or type in their names and click ‘OK’.
6. Once the members have been added to the group, click ‘OK’.