Room mailbox unexpectedly disappears from an Outlook 2010 meeting invite

Article ID: 2500176 - View products that this article applies to.
Expand all | Collapse all


When you use Microsoft Outlook 2010 to organize a meeting and invite a Microsoft Exchange Server resource (room) mailbox to the meeting, all resource mailboxes that you added to the meeting unexpectedly disappear.

Note This problem only occurs when the Room Finder is visible.


This problem occurs when the primary SMTP address of a resource mailbox that you add to the meeting contains an ampersand (&) character. For example, the SMTP address is R&


Use one of the following methods to resolve this problem.

Method 1: Install a hotfix update

To resolve this problem, install the following hotfix package:

2687392 Description of the Outlook 2010 hotfix package (Outexum-x-none.msp): August 28, 2012 

Method 2: Hide the Room Finder

To hide the room finder, click the Room Finder in the Options section of the Ribbon on the meeting item.

Method 3: Remove the ampersand character from the primary SMTP address of the resource mailbox

Contact the administrator for your organization to have them remove the ampersand character from the primary SMTP address of the resource mailbox.

Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.


Article ID: 2500176 - Last Review: October 12, 2013 - Revision: 6.0
Applies to
  • Microsoft Outlook 2010
  • Microsoft Exchange Server 2010 Enterprise
  • Microsoft Exchange Server 2007 Enterprise Edition
  • Microsoft Exchange Online Dedicated

Give Feedback


Contact us for more help

Contact us for more help
Connect with Answer Desk for expert help.
Get more support from