Hi
It took me a while to follow all your suggestions as I made one change at a time and tested on a Zoom call before making the next change. I have completed all of the steps you suggested. Unfortunately the problem still persists.
After some significant research and trying out various options I think I have a fairly good idea of the problem. Looks like the Surface Bluetooth adapter does not recognize that the AirPods has a mic when operating as Headphones in stereo mode. The AirPods mic works fine on the Headset Handsfree free mode but when it is does that, there is a degradation in sound quality and static sounds start after about 30-40 minutes into the call.
Is there anything we can do for the Surface Bluetooth adapter to recognize that the AirPod headphones has a mic or should I purchase a USB Bluetooth adapter like the one from Jabra and disable the internal Bluetooth adapter to solve my issue?
Thanks for your input and help.
Venky