Ktpass

Configures the server principal name for the host or service in Active Directory Domain Services (AD DS) and generates a .keytab file containing the shared secret key of the service. The .keytab file is based on the Massachusetts Institute of Technology (MIT) implementation of the Kerberos authentication protocol. The Ktpass command-line tool allows UNIX-based services that support Kerberos authentication to use the interoperability features provided by the Kerberos Key Distribution Center (KDC) service in Windows Server 2008.

Read how to configure at https://technet.microsoft.com/en-us/library/cc753771(WS.10).aspx?ocid=soc-n-SA-loc-services-omers