Microsoft Outlook cannot provide form scripting support. (This is through a terminal services session)

We receive the following error when opening a "tentative" appointment Outlook 2010 through a 2X terminal services session.

Microsoft Outlook cannot provide form scripting support. This feature is not available. For more information, contact your system administrator.

I hit OK a few times and the appointment eventually shows. No issues with any of the other appointments.

Server is running Windows Server 2008 R2 Enterprise SP1.

Thanks