mail software to add entry for ldap

Hi all I want to use a shared addressbook with client like exchange. Thereupon I've installed openldap on linux server and installed thunderbird on client site (windows clients). Then I could see the contacts which I inserted manually by ldif file, in the thunderbird's addressbook. But when I wanted to add a new entry as a contact by using thunderbird on the client machine, I learned that thunderbird does not support this. So which mail software do you suggest to add any contact on windows client? Regards