Unwanted adding addresses in Local Addressbook

I have a question about the personal address book in Notes 8.5.1,

when users send an email to (for example) e.janssen@hotmail.com then the address is stored as a last used address in the local address book.

This will sometimes create a problem, because our users are so fast that they hit the e.j and dont check if it is e.janssen@hotmail.com or e.janssen@work.com.

To solve this issue we can check a box on the client (File, Preferences, Contacts) : “Do not automatically add names to the Recent Contacts view”

then the issue is solved.

But in the Domino Administrator this option is not available when I look at the policies.

How can we make this one work? Can we adjust the notes.ini or something? And if we can, what should do the thrick?

Subject: notes.ini value

the notes.ini value that will set the preference to “Do not automatically add names to Recent Contacts” is DisableDPABProcessing=1