Microsoft quietly rolled out this week a cumulative update for its Lync 2013 client that includes support for two-factor authentication.

Believe it or not, Lync client didn't have two-factor authentication support before now. And after this week's rollout, the Microsoft Lync client is the only client for Lync that does offer two-factor authentication, a company spokesperson told me. (There were some tools in place for managing Lync Security and authentication before now, but not two-factor authentication in the client, the spokesperson added.)

Lync is Microsoft's unfied messaging product. It includes business instant-messaging, presence, VOIP and online meeting functionality and is the business complement to Skype
Read more at: Microsoft adds two-factor authentication support to Lync client | ZDNet