Disable the external email address in the address field in IBM Notes 9

Is it possible to disable the external email to not appear in the address bar, but only to show the email address of the internal address? To make it easier to understand, I added the following screenshot. So basically, the address that shows the external contacts. I do not want them to show up when I write in James, since there are other James in my internal contacts that I want to appear in place of the James external contact.

Thanks in advance.

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