Microsoft KB Archive/816902

= Real-Time Communication HTTPS Connections Do Not Work When Internet Explorer Enhanced Security is Enabled =

Article ID: 816902

Article Last Modified on 12/3/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise x64 Edition
 * Microsoft Windows Server 2003, 64-Bit Datacenter Edition
 * Microsoft Windows Small Business Server 2003 Premium Edition
 * Microsoft Windows Small Business Server 2003 Standard Edition

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SYMPTOMS
When you try to establish a secure hypertext transfer protocol (HTTPS) connection by using a Real-time Communications (RTC) client program, you are unsuccessful.



CAUSE
This behavior may occur if the following conditions are true:
 * The Web proxy server permits HTTPS connections but not HTTP connections.

-and-
 * The Microsoft Internet Explorer Enhanced Security Configuration is enabled on the server.

Windows Server 2003 includes increased security functionality. As a result, when the RTC client tries to create an HTTPS connection, the Windows operating system sends an extra GET request to look for certificate revocation of the Transport Layer Security (TLS) certificate on the RTC server. This GET request can only be sent by using HTTP proxying.



WORKAROUND
To work around this behavior, enable HTTP proxying on the Web proxy server.



STATUS
This behavior is by design.

Keywords: kbprb KB816902

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