Article ID: 2500176 - View products that this article applies to.
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&DLab@contoso.com.
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:
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.
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.