Lync without OWA

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.
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Jian An LimSolutions ArchitectCommented:
you can implement 2 factor authentication but not removing OWA features.
if it is MS vulnerability, then talk to microsoft about that. they might release a patch faster then you disabling them.

I can't comment on security issues as this is very dependent on company.

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