How do I sync NT,Unix and Samba password

[Heather Tan]

hello,

My attempt to synchronise NT passwords with Unix and
Samba passwords has failed.
Can you help me ?

I had set up Samba running on an unix server and had
also joined Samba to NT domain. 
The content in my users.map file on unix are 
like this :

sambausr = heathertan
sambausr = roberttan
sambauser = peterchan

As the start, sambausr has the same password on
NT,Unix and Samba.
My understanding is that when I change NT password for
sambauser, the Unix and Samba passwords for sambausr
can be synchronised. But I don't seem to get that. My
current configuration is as follows :

security = Domain
encrypt password = Yes
null password = no
unix password sync = yes

Did I miss out any parameter ?

Thanks


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