[IE] Internet Explorer keep asking for user credentials

I had an issue in my company's product which is Internet Explorer was asking about user credentials on every request.
Despite the user is submitting the correct username and password but IE was asking again about it.
The issue was happening on IE and firefox however it was working fine with google chrome.
The issue was in loop back check, it had to be disabled for the site URL.
The below article helped me a lot in this fix, hope it'll be helpful for you.

https://blogs.technet.microsoft.com/sharepoint_foxhole/2010/06/21/disableloopbackcheck-lets-do-it-the-right-way/


Best Regards,
Ahmed Gamal