A pen test confirmed the latest MS vulnerability in a hacker being able to intercept password. Now we are doing a 2 factor authentication but also removing OWA features. What will I be losing within my Lync 2013 environment. We have federation with other companies as well as with PIC. We also use Lync mobile and 'sometimes' conduct meetings with non-lync clients. I have a feeling that we will be losing more than just presence.