I was testing Teams today for viability as our meetings software package. However we have run into a serious issue. When an external user joins via the browser the resolution of the screen share is so low as to render the image unrecognisable. The user then installed the Windows client and re-joined. This time the resolution was somewhat better but still not full quality. Also the lack of an "Actual Size" button as in Skype for Business is a real limitation with regard to screen sharing.