Originally Posted by juwaack68
What is that setting called? And what version of BES are you referring to?
It's not really a setting, as much as it's setting up a peer-to-peer encryption key on the BES. If you set up a P2P encryption key, then only devices on that particular BES will have the key and can only PIN with eachother, since outside BlackBerry devices wouldn't be able to decrypt the messages.