Authentication With Server Failed : No authority could be contacted for authentication

Hi,

The authentication error seems to suggests that the server is failing to connect to your domain. Please verify if the LDAP paths are correct in the "RoleInit" column of the HostServer.SecurityLabel table in the K2 database (for the K2 label).

Another thing is do a ping or run a nltest /dclist:<domain> command in command prompt to check the connectivity between your AD domain controller and the K2 server or SQL server. 

Regards,

Divya Raj