We are running on SharePoint 2013 On Premise, Claims Based Authentication, windows Authenticaton (NTLM).
Is it possible to change the normal "username/password" popup-window to a web form (of any kind). The requirements is that our code should to the authentication against the AD and if any errors occurs (for example password expired) the user should be informed on the web form.
(we are not running ADFS, but will consider it if its the only way)
I would like to keep windows authentication, since most of our users are internal and must be automatically logged in to SP. this article (answer on one of the comments) suggests that its possible, but the article uses FBA