If you are on a Windows PC, use the Adding a Multi-Folder Calendar to Outlook procedure.

Step-by-step guide

  1. Click FileOpenOther User's Folder…
  2. Type the name of the shared calendar (e.g. Room Assignments Calendar).  Make sure the Folder Type is set to Calendar.  Then click Open.
  3. The shared calendar appears under the Shared Calendars group in Outlook.