Yes, I have tries using

    But that’s no good for me. GroupWise.AddressBookResolveFullName() is only working through the address books that are included in the NameCompletionSearchOrder list.

    Let’s assume this: You click reply on a message from ‘John Doe <john.doe@something.com> (John Doe is not in any address books)

    In the To: field you will see ‘Doe, John <something.com>’.

    Unfortunatly Msg.To_ will ony return ‘Doe, John’ and the true internet address missing.

    There is no way I can resolve the internet address for him using GroupWise.AddressBookResolveFullName().

    Can you tell me what API call Formativ is using for retrieving the value of the Msg.To_ field?