Hello Carol,

Only enabled users will show up on the calendar list.  I think what you should have done instead is just manually created a firm calendar for the Conference Room. It will show up under Group calendars and will available to select when creating events.

For Outlook users: be wary that any conference room calendar you set-up in SB doesn’t sync back to what you might have used in the past as a conference room calendar in Outlook. 

Outlook calendars are fine for syncing authorized users’ calendars.  That’s it.  Hence, we rely exclusively on SB for shared office resource calendar records, like conference room, vacation time off, etc.