Microsoft now offers an official guide on how to add a calendar in Outlook on the web or Outlook.com. Their instructions include the latest interface updates and apply to current versions of Outlook across platforms.
You can view Microsoft’s guide here:
Add a Calendar in Outlook.com or Outlook on the Web (Microsoft Support)
The tutorial below remains available for reference and may be useful if you are using an older version of Outlook or prefer our local instructions.
Click on “Add Calendar”.
Click “From Address Book”.
Click on the drop down box and change to “Global Address List”.
Type the name of the room you’d like to view/add and then double click the highlighted room.
After double clicking, the room will be displayed on the bottom bar. Click “OK”.
The added calendar will be displayed on the left-hand side. You may rename “Rooms” by right clicking and then selecting “Rename”
Finally the calendars that have been added will be displayed like any other calendar.
