You marked "RoomMailboxName" as a resource. You cannot schedule a meeting with "RoomMailboxName" because you do not have the appropriate permissions for that account. Either enter the name as a required or optional attendee or talk to your administrator about giving you permission to schedule "RoomMailboxName".

2017-12-11T14:50:44+00:00 August 5th, 2011|Exchange|

You receive the following error when creating a meeting request for a Room Mailbox using Exchange 2010:

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I confirmed that all permissions were correct and compared the settings against another Room Mailbox that was working correctly.

Solution:

  1. Create an Outlook Profile for the Room Mailbox that is experiencing issues
  2. Launch Outlook with the newly created profile
  3. Open Resource Scheduling (File > Options > Calendar > Resource Scheduling)
  4. Ensure that the following options are NOT selected:
    • Automatically accept meeting requests and process cancellations
    • Automatically decline conflicting meeting requests
    • Automatically decline recurring meeting requests