Lync 2013 SDK ActivityID for "In a conference call" and "In a meeting

The Lync 2013 SDK has some pretty non-intuitive ActivityID strings used as "identifiers" for the built-in availabilities.

Here are the ones I have deciphered:

• Available - "Free"
• Busy - "Busy"
• In a call - "on-the-phone"
• In a meeting - ???
• In a conference call - ???
• Presenting - "in-presentation"
• Do not disturb - "DoNotDisturb"
• Be right back - "BeRightBack"
• Inactive - "Inactive"
• Away - "Away"
• Off work - "off-work"

I have been unable to discover the ActivityId for either "In a meeting" or "In a conference call" because they require Exchange Server and Office Web Apps Server, respectively, neither of which I have readily available to me at the moment.

Does anyone know what these two missing strings are?

Okay. I decided to write a simple Lync SDK client that would allow me to try setting the Availability, and I was able to discover the missing IDs through trial-and-error. For posterity, they are:

• In a meeting - "in-a-meeting"
• In a conference call - "in-a-conference"