Error message when a user tries to open a forwarded message to accept or to deny a resource request in Exchange Server 2007: "Cannot open the free/busy information"

Consider the following scenario:

• You create an account for a user ("User 1") as a delegate for a room mailbox on a computer that is running Microsoft Exchange Server 2007. The User 1 account has e-mail functionality enabled.
• Another user ("User 2") creates a meeting request that involves the room mailbox as the resource.
• User 1 logs on to his or her mailbox to receive the forwarded e-mail message from User 2 that asks for the resource to be approved.

When User 1 tries to open the forwarded e-mail message to accept or to deny the resource request, User 1 may receive the following error message:

To resolve this problem, install Update Rollup 3 for Exchange Server 2007. For more information about Update Rollup 3 for Exchange Server 2007, see the following Exchange Help topic: For more information about how to install the latest Exchange service pack or update rollup, see the following Exchange Help topic:

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.