ntrights usage

need to establish logonservice rights on new machines. does anybody know the usage of ntrights?
I tried ntrights -u <username> +r ServiceLogonRight and got:

C:\>ntrights -u <username> +r <service>
'ntrights' is not recognized as an internal or external command,
operable program or batch file.

According to the error message you don't have ntrights in your path.