Index diagnostics error: "Cookie manager was unable to find any valid cookies"

Summary:  For one or more URLs, crawl diagnostics is showing:

Error: Cookie Manager was unable to find any valid Cookies for the configured Forms Authentication Rule.


Cause: This error can happen when the configured content server fails to send a cookie as part of the authentication process.


Troubleshooting Steps:

  1. Navigate to realtime diagnostics on the Content Sources > Diagnostics > Real-time Diagnostics page in Admin Console.
  2. In the Manual fetch request box enter the URL that you previously entered as the Sample Forms Authentication protected URL field.
  3. Compared the headers from the Manual fetch request to the headers captured from your browser performing the same request. Differencies or anomalies may highlight the cause of this issue.

Additional Information:

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