warp server domain settings

[iddwb]

I've attempted to change my

security = server 

to

security = domain

in an attempt to have samba join my os2 warp server domain.  However,
smbpasswd -j MYDOM -r MYSRV fails with "failed to change password
.. Unable to join domain"

Has anyone got domain security to work with os2 warp server?  It's been
working fine with security = server.  I wanted to reduce authentication
traffic with domain level security.

David Bear
College of Public Programs/ASU