500 Internal Server Error - The received certificate has expired.

PROBLEM
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500 Internal Server Error - The received certificate has expired. (-2146893016) Internet Security and Acceleration Server
CAUSE
This issue occurs if both of the following conditions are true:
You publish a Secure Sockets Layer (SSL) Web site by bridging the SSL connection to the internal Web server as SSL. In other words, Internet Security and Acceleration (ISA) Server receives an SSL request on the external interface and then requests the Web content from the Web server by using an SSL request. -and-
The certificate on the internal Web server has expired.The error message that is described in the "Symptoms" section describes the error as an internal ISA Server error. However, this error message actually indicates a problem with the published server's certificate.

RESOLUTION
To resolve this issue, obtain a new certificate for the published Web server. This error no longer occurs when the published server has a valid certificate.