Getting a 401.5 Error in SharePoint when it tries to display the login page. Any ideas where to start debugging?

by

I have a site I am configuring to support forms based authentication in SharePoint. I am stuck because I get a 401.5 error (unauthorized) when the login page is displayed.

Any tips for getting started in the debugging process?

I already know that 401.5 means an ISAPI Filter has told IIS the request is not authorized.

Answer

May be related to Wildcard Application Mapping, or non-standard Application Mapping.

Some good troubleshooting ideas here:

HOWTO: Diagnose 401.x HTTP errors on IIS

Attribution
Source : Link , Question Author : Jeff , Answer Author : Brian Meinertz

Leave a Comment