When users point Internet Explorer 11 to a local proxy PAC file, the browser keeps attempting to load web pages. Users cannot access the internet. The PAC file works correctly in Internet Explorer 8 and 10, and users can access the PAC file from their computers.
This is known issue with Internet Explorer 11. The "local" PAC file (directory starting with "file://") is not supported.
For Internet Explorer 11, the WinINET team has disabled WinINET’s support for file:// based scripts to promote interoperability across network stacks. You can put your PAC file on a HTTP/HTTPS-accessible server and use that link for Internet Explorer 11 proxy settings.
Imported Document ID: 000012293
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