LDP2408E Modify of field(ExpireNow) not supported

Document ID : KB000076786
Last Modified Date : 09/04/2018
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Question:
I get the msg when running ldapmodify with this LDIF example I found on the support site ================================================================ dn:tssacid=MAHTEST,tssadmingrp=acids,host=SYSL_im,o=unionbank,c=us changetype: modify replace: userPassword userPassword: xxxxxxxx - replace: ExpireNow ExpireNow: Y ================================================================ Why can't ExpireNow be modified? 
Environment:
z/os
Answer:
Delete the lines referencing ExpireNow from my LDIF file, and replaced "userPassword: xxxxxxxx" with "userPassword: xxxxxxxx,,exp",