Access an Office 365 Group Calendar in Outlook Desktop Application

Office 365 Groups can be used as a shared calendar to which everyone in the group has access. If you are already a member of the Group, this may already show up in Outlook. If not, follow the steps below to open these calendars in Outlook. 

1. Join or view the group in Outlook by selecting Browse Groups from the ribbon at the top of the screen. (If you do not see this option, you may need to turn on the cached mode in Account Settings). 

2. From the Browse Groups window, search for the group(s) you require and click Join. If you are already a member of the group, select View. 

3. The group should now show under the Groups section on the left-hand sidebar in Outlook. 

4. Select the Calendar icon at the bottom right of the Outlook window. You should now see the calendar for the group under the All Group Calendars heading. Check the box to view the group calendar. Any appointments you place in here will be viewable by all other members of the group. 

Note: Please refer to the article Join a group in Outlook (microsoft.com) for more information.