We have Polycom CX600's USB tethered to Windows 10 computers running Skype for Business 2016 connected to a Lync 2013 back end. A few users noticed that they have to press the Answer button instead of just picking up the handset to speak to a incoming caller. The difference is that when they select their primary device in Skype for Business, it shows "Speaker Phone". When it's operating correctly, it shows up as "Handset". I can get it to switch to "Handset" if I power cycle the CX600 while the user is logged on. It will revert back to "Speaker Phone" if the user reboots their computer. Here's what I've tried:
1. Remove the CX600 drivers from Device Manager.
2. Remove the sign in information from Skype for Business.
3. Switch to a different USB port.
If another user logs onto the same PC and we "Switch User" on the CX600, it show up as "Handset".
Is there something else I can try?
-- Victor Solis