To remove access rights to a column in an NIS+ table, you use the -u option as described above in "Adding Rights to an Existing Table Column" except that you subtract rights with a minus sign (rather than adding them with a plus sign).
The example below removes group's read and modify rights to the hostname column in the hosts.org_dir.doc.com. table.
client% nistbladm -u 'name=g-rm,hosts.org_dir.doc.com.' |