Hello,
LDAP passwords can not be synchronized / exported to Alfresco with the default LDAP subsystems. I don't know wether password export from LDAP is at all supported unless you maintain it as an additional, clear-text property in LDAP (which you shouldn't). If you could get a MD4-hashed variant of the password securely from LDAP, maybe it would be possible to implement a custom NTLM / CIFS authenticator in Alfresco to support authentication against LDAP even for CIFS, FTP and other specific interfaces.
Regards
Axel