Login Failure - The target account name is incorrect Windows 2012r2
In a multi server where you have 2 domain controllers. The secondary or non holder of all FSMO roles. (Server2)..
To re-sync the krbtgt password: On Server2, stop the kerberos key
distribution center service (kdc) and set it to "disabled". Then reboot
the server, set kdc to automatic and start it. Done.