This optional parameter defines the name of the NIS+ table to search in. It defaults to passwd.org_dir which is the name of the standard password table in NIS+. You would not normally need to change this. You could define your own NIS+ table with your own table structure to authenticate from, and define the name of the table with the Table parameter. You might occasionally want to specify a table for a specific domain with Table:

# Use the mydomain.com password table
Table passwd.org_dir.mydomain.com