1. Open Outlook. In the bottom left corner, click the Calendar icon.
2. Right click My Calendars in the left pane, select Add Calendar, and then click From Room List.
3. Search for the calendar you're looking for. Double click the calendar in the search result and click OK button. In this example "IT Vacation Calendar" is being added.
The calendar will now be shown under "My Calendars" on the left side in Outlook.