[Samba] sambaLMPassword needed?

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Hi
I have upgraded or old samba PDC (debian lenny) to samba (debian wheezy).
We use openldapto authenticate ,our linux and windows users.
Now I see that if I create a new user the smbpasswd (in a script) does 
not create the sambaLMPassword attribute anymore.
Do we still need it. I have read some info about it but its not clear if 
its still needed or not
Thankyou for any help