Web Request Control - returned (401) Unauthorized

  • 7 June 2018
  • 1 reply
  • 1 view

Badge +4

Hi All,

When I am executing below request using Forms web request control, it returns (401) Unauthorized. But when I try executing same using browser, it works !

Web Request :

WebReq

But, verifying ULS logs shows this : 'Claims Windows Sign-In: Sending 401 for request **** because the user is not authenticated and resource requires authentication'.

WebReq_ULS

This works absolutely fine in SP 2013. But after migrating to SP 2016, we are seeing this.

Thanks.


1 reply

Userlevel 5
Badge +13

Hi Nagarjuna Ch‌,

It sounds like it may be a server related loopback issue. Have a look at this support article as it may assist you.

Regards,
Euan

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