We have had a long standing issue with ESET and being able to login to sites or apps that use MS authentication. We have an internal application and our login to Office 365 fail to login. You try to sign in, enter the username and password, go to our federated server for the authentication and then get turned right back out to the network login. A few turns at doing that, and sooner or later we start locking accounts.
We ultimate figured out the issue was an issue between Windows 10 v. 1803 and ESET. Works fine up until we install ESET and then, once it's installed, we can't login any longer. I can't speak to the 1809 build but it definitely happens with 1803. We figured out a work-around until a patch comes along - we have to go into web access protection and disable http protocol checking and https checking. With those disable, everything works fine.
Any ideas why this is an issue or is there a patch in the works to address? I don't like having to do the work around obviously, but as we roll out more windows 10 machines and move more to office 365, it becomes a bigger issue.