Restricting Room Mailbox Bookings to Specific Groups in Exchange Server 2013

**To Restrict Room Mailbox Bookings to Specific Groups in Exchange Server 2013 you need to execute the following commands on the Exchange management shell: 
**

  1. Set-CalendarProcessing -identity CCO_Room -AllBookInPolicy $false
  2. Set-CalendarProcessing -identity CCO_Room -RequestInPolicy $none
  3. Set-CalendarProcessing -identity CCO_Room -BookInPolicy CancerControlOffice
  4. Set-CalendarProcessing -identity CCO_Room -AutomateProcessing AutoAccept
  5. Set-CalendarProcessing -identity CCO_Room -RequestInPolicy $none

**
For more details you can refer to the following link:**

https://technet.microsoft.com/en-us/library/dd335046(v=exchg.160).aspx

Best Regards **
**
Asem Abd Al-Baqi