TFS 2017 and logon name

Hi

Hi, i installed TFS 2017 with MS SQL 2016 on same server (Windows Server 2012 R2).
When i'm logging in web interface in Chrome i use "user.name + password". It doesn't works for IE, EDGE and Visual Studio. There i have to use "\user.name + password".
Why logon format is different?

if i try to use "domain\user.name + password" it doesn't works. Why?

How can i bring all to the same standard?

Thank you!