Users are seeing this error : "Cannot use form authentication for CONNECT method (explicit proxy of https URL)" when connecting to HTTPS sites
This error occurs when authentication is done via a form, and a workstation send a 'Connect' request to the proxy. A connect request is how a browser that is explicitly configured to use a proxy asks to open secure connection on a port that isn't 80. For example, typing in https://www.verisign.com in a browser would generate a request that looks like this : CONNECT www.verisign.com:443
By standard, it is not possible to redirect a 'Connect' request so it is not possible for the proxy to send a redirect and point the browser to the authentication form. This is not a product limitation, browsers generally don't follow redirects when the HTTP method used was 'Connect' for security reasons.
To go around this limitation you will need to add the follow CPL Code
1) Bypass authentication for the method which involves adding the following code to the local policy file
Imported Document ID: 000014418
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