nEnforce user logon restrictions: Turns on Kerberos
security, which is the default
nMaximum lifetime for a service ticket: Determines
the maximum amount of time in minutes
that a service ticket can be used to continually
access a particular service in one service
session
nMaximum lifetime for a user ticket: Determines the
maximum amount of time in hours that a ticket can be used in one continuous session for access to a computer or domain