Firstly thank you for giving all those things a try, it's refreshing to see someone try and troubleshoot before running for help. 1. How congested is the area with neighbouring SSIDs? 2. What method of authentication are you using, is it possible that EAP is timing out and the user is having to re-authenticate to the wifi? 3. Do you have any traffic shaping enabled i.e. per user or per SSID bandwidth limit and could you be maxing out your WAN connection? 4. Are all of the users joining the same teams meeting from Multiple devices? Could you try another approach of using a room based system reducing the load to a single connection?
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