Lync 2010 Client Licensing

Q: (from Willie)

I know that the Enterprise CAL is not a prerequisite of the Plus CAL, but if the customer only wanted voice functionality would they still need the Standard CAL (I feel confident the answer is yes, but I could not find it in the licensing guide and I didn’t want to assume)? Is there a lite version of the Lync desktop application like they have with OWA and Exchange or does the customer have to own the Lync desktop app or have a copy of Office Pro Plus 2010?


Let’s start with the fact that we’ve moved from a Standard/Enterprise CAL model in OCS to a Standard/Enterprise/Plus CAL model in Lync. The Standard CAL provides the foundation with IM and presence capabilities, the Enterprise CAL provides conferencing support, and the Plus CAL provides voice support. The Standard CAL must be acquired for all licensed Lync users and as a prerequisite for the Enterprise CAL, the Plus CAL, or both.

The Lync licensing page has good details:


There is a Lync Web App just like an Outlook Web App (OWA). There is also a free downloadable Lync 2010 Attendee (admin or end user). This forms a spectrum of rich client (Lync 2010 Office Client), thin client (Lync 2010 Attendee), and web client (Lync Web App). I’m still looking for a client feature comparison matrix.



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