Hopefully the authentication occurs in IE is different than Chrome or Firefox and other browsers. In IE, an NTLM Negotiate authentication is tried first, and then downgraded as appropriate. This issue only occurs when a list item that contains a validated user is saved. If a record is created with a user field populated, but not validate, the save is successful. If the user field is validated prior to the save, it fails. Is this anything related to people picker field? Please advice
I am aware of if I use the basic authentication method will not produce any error; So is it because of NTLM method?
Clue : Recently the domain has been changed. And there might be some changes/updates that might happened on firewall/network infrastructure.
Kindly let me know your valuable inputs to resolve the issue.
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