Internet Information Services
Microsoft web server software.
This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
I am unable to login to a web page in first try. During first 3 attempts I get "Invalid Username or Password" error, In 4th attempt the login is successful with same username and password. W3SVC logs contain 302 error code for the time this URL is hit from initial 3 failed attempts.
Contact the developers of that web page for assistance. It's not likely to be caused by IIS, so you alone won't be able to resolve.