From j2anywhere.com: Address Book X LDAP (ABxLDAP) allows you to share the contacts from your Addressbook with others using a shared LDAP directory. ABxLDAP allows you to transfer your contacts seamlessly to a shared LDAP directory. Instructions on the configuration of a directory are included in the manual. ABxLDAP supports several schema mappings, including it's own, Thunderbird and Outlook.Support to share individual groups or the entire Address Book.
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