Related KBs:
Outlook - Sharing Your Calendar
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[Link for document 84308 is unavailable at this time]
Outlook - Attachment and Recipient Limits
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Outlook - Forward an Email as an Attachment
Outlook - Prevent .ost File Errors

1. Remove any existing favorites for the Public Folder calendar (if present).

2. Open the Room calendar from the directory.

3.  Highlight your selection of rooms and select the "Rooms ->" key to add them.  Once you're finished, select "OK."

4. When creating a calendar item within your own calendar, you can also invite the room as an attendee.  Click New Appointment to view the Scheduling Assistant option.