I am trying to host a SQL server database, but whenever I try to connect to it I get this error:
The login is from an untrusted domain and cannot be u
I was facing the issue while connecting to SQL Always On Listener. Disabling the loop back check resolved the issue.
Edit the registry using regedit. (Start –> Run > Regedit )
Navigate to: HKLM\System\CurrentControlSet\Control\LSA
Add a DWORD value called “DisableLoopbackCheck”
Set this value to 1
https://blog.sqlauthority.com/2017/04/18/sql-server-login-failed-login-untrusted-domain-cannot-used-windows-authentication/