Stop Microsoft Lync contacts from syncing to your Windows Phone

I've noticed that all my Microsoft Lync (previously OCS) contacts show up in my Windows Phone People Hub (contacts/address book).  This is because Lync by default syncs all your contacts to your Outlook personal contacts.  And if you tried to delete those contacts from Outlook, they would just reappear again the next time Lync synced itself to Outlook.  So to keep your OCS / Lync contacts out of your Windows Phone address book, there is a simple checkbox (as seen below) which you have to uncheck in the Lync Personal Settings.  See below: