[Samba] samba / ldap

[azzouz]

hi,

I want to upgrade our LDAP server and our SAMBA PDC server  whitch 
support the  LDAP for user identification and authentification under 
windows.

The ldap sever release is 2.0.23 and we want to install the last stable 
one 2.3.19
The samba server release is 2.2.6 and we want to install the last stable 3.0

Could someone tell me if there are no probleme for upgrading ? How to 
migrate all the windows machine in the domaine "Samba PDC/Ldap" without 
réingrating them again ?

thanks sincerely