The meeting is a presentation rather than a conference call and therefore no microphone is needed to provide feedback. Joining the call results in a Lync/Skype For Business error that there is no valid recording device and asks me to setup an audio device. There is an option to retry or to call a number but I want to listen through my computer using my headphones, not my phone.

I have read that this appears to be a bug that has been around since at least 2010 but does not seem to be addressed. Can anyone suggest a workaround?


In response to suggestion that workaround might be OS specific...

Lync 2013 (15.0.4727.1001) / Skype for business 2015

Windows 7 64-bit

  • 1
    In my experience, it's not possible. You can only join a call if you have a microphone, even if you just want to listen. – Colonel Panic Dec 17 '15 at 14:28

Method 1: You can use some virtual audio device, like this one. After installing it, you will see a new recording device in Control Panel (mmsys.cpl) and Lync will allow you to join the audio call.

Method 2: According to this article, you can trick Lync/S4B without installing any software but you still need admin rights to edit registry:

  1. Insert your headphones into microphone plug for 10-15 seconds to initialize it (the microphone) in drivers.
  2. Open regedit.exe and proceed to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices\Audio\Capture.
  3. Find the subkey with DeviceState = 0x00000008 and change it into 0x00000001.
  4. Check for a new recording device using "control mmsys.cpl,,1", start Lync and join the audio call.

Method 3: If you don't have admin rights, just put some old headphones into the mic plug.

  • This works, but the audio quality will be terribad. Desk/headset mics are cheap nowadays. – Mikey T.K. Mar 18 '16 at 19:58
  • You right but it's not an issue if don't plan to speak through this "microphone" and just want to hear the others. – mtm Mar 18 '16 at 22:26

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