Sync or update certificate in contacts

When a user (e.g. A) copied / saved another user's (e.g. B) information from Domino directory into A's local address book, B's Notes public certificate will also being copied.

From time to time, B's Notes public certificate changed in Domino directory. When A sent Notes encrypted mail to B (using the old Notes public certificate of B in A's local address book), causing B can't decrypt A's mail.

Notes/domino should allow user optionally to save / don't save the target person's Notes public key (e.g. show popup to let user choose) into local address book. Or check and sync public key on local to same with which in domino directory.