The transport option is not automatically set to TLS when you click "Manual configuration" in "Advanced Connection Settings" in Communicator 2007

When you click Manual configuration in the Advanced Connection Settings dialog box in Microsoft Office Communicator 2007, the Connect using transport option is not automatically set to TLS. In this scenario, you must manually click TLS when you enter the server name or the IP address.

This problem occurs if the following conditions are both true:

• The EnableSipHighSecurityMode registry entry is set to 1.
• The Connect using option in the Advanced Connection Settings dialog box is set to TCP.

This problem occurs because Communicator 2007 does not update the transport registry key when you change your configuration.

How to obtain the hotfix

This issue is fixed in the Communicator 2007 Hotfix Package dated October 5, 2007. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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