Set Internet Address when you register a user for Other Internet Mail.

When you register a new user whose Mail System is "Other Internet Mail", you cannot set an internet address in the Register Person window.

The messages sent to the Other Internet Mail user will transfer to Local Internet domain smart host. The address will be converted as "UserName/O%DominoDomain@hostname" if the user document does not have the Internet Address.

You can add the Internet Address in your own format by editing a person document after you register an "Other Internet Mail" user with the Domino Administrator.

I request Domino Administrator can register an "Other Internet Mail" user with the internet address.