Mapping a Group to a Role
If the user belongs to a group that is not associated with any role or if the group is disabled, the user will not be able to login to the array
NOTE: For users of systems prior to Windows
2000: If you try to add a group with a name that contains special characters, the
special characters are replaced with underscores (_). Whenever you use that group
name, you must use the version of the group name that includes the underscores. The
group name that contains special characters is not
valid.