Cause:

Microphones set to record at any other frequency that 48khz are not compatible with Webex proximity pairing, and users will see an "Incompatible Microphone error.

Solution:

Microsoft Windows

To fix the problem:

1. Right-click on the speaker icon in the lower-right corner of your desktop screen:
2. Click on Sounds.
3. In the Recording tab, select your microphone, and click Properties:

4. Click the Advanced tab.
5. Under Default Format, select 48000 Hz in the drop-down, then click Apply:

6. Then exit out of the Webex app and relaunch.