I have an installed Kerberos database that I need to set up policies
for. As such I have 2 questions:

1) This is an established working kda but no policies are assigned to
any principals. However, when I do a listpol, I get back:
policy1438560min. Is this a required default policy the installation
created or is it something I can delete?

2) Once I create a policy, how do I assign it to all users en mass.
All I can find seems to imply I have to do it for each individual user.