• Go to https://apps.rackspace.com
  • Login as yourself
  • Click Calendar
  • Click Manage Calendars
  • Click Edit
  • Click the Permissions tab
  • Click All users in my domain can view my calendar
  • Click Save

    To add another user's shared calendar
  • Click Add a Shared Calendar or click the green +
  • Choose from the available calendars
  • Choose Add
  • Click Save
  • Once you see the new calendar you've added check the box beside the calendar.  You may also choose to change the color of the calendar so that you can differentiate between your personal events and the shared calendar.