What options are available in the user-override file.
When overriding a single user you can modify any single attribute in this format.
When overriding by group however you cannot override the uid number ,gecos or the name as those need to be unique.
Examples taken from /etc/opt/quest/vas/user-override.sample
# Sample user-override file
# This assumes that the host has been joined to the example.com domain.
# To validate user-override file: vastool status
# Overrides the Unix name of the user in example.com with samaccountname to
# john_doe. john_doe's local uid is also set to 708, while his local gecos
# field is set to "Overridden Gecos".
#alternatively John Doe could be identified by his user principal name (UPN).
# Overrides the Unix name of user Robert in the Example domain (setting it
# to bob). Robert will also now have the default shell of /bin/sh, and a
# primary gid of 1200.
# Overrides every member of the group example_group to have the bash shell and
# a home directory of /home/<username>. The %s is replaced with the user's Unix
# name. With group overrides you can only override the shell and/or home
# Alternatively example group could be specified using it's unix group name for
# backward compatibility (although not recommended).