IIS 8.5 Detailed Error – 404.11

Most possible causes:

• The request contained a double escape sequence and request filtering is configured on the Web server to disclaim double escape sequences.

Things you may attempt:

• Verify the configuration/system.webServer/safety/requestFiltering@enableDoubleEscaping setting within the applicationhost.config or net.confg file.

Detailed Error Information:

More Information:

This is a safety function. Do not change this function except the scope of the change is absolutely understood. You ought to take a community hint earlier than altering this worth to substantiate that the request shouldn’t be malicious. If double escape sequences are allowed by the server, modify the configuration/system.webServer/safety/requestFiltering@enableDoubleEscaping setting. This may very well be attributable to a malformed URL despatched to the server by a malicious person.

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