Video is very bandwidth-demanding. For "best performance" Microsoft recommends allowing 4Mb/s per client. https://learn.microsoft.com/en-us/microsoftteams/prepare-network I have seen one company impose a 720p video limit in Teams because they ran out of capacity. Note in the link if you search for "WiFi" you'll find recommendations from Microsoft about use over WiFi. If you are bored, this is the Meraki VoIP best practice guide: https://documentation.meraki.com/Architectures_and_Best_Practices/Cisco_Meraki_Best_Practice_Design/Best_Practice_Design_-_MR_Wireless/Wireless_VoIP_QoS_Best_Practices If it was me, I could go for 20 users per AP (not per RADIO). I would disable 2.4Ghz. I would require anything that can not support 5Ghz or 6Ghz to be replaced. I would not feel confident of getting that much consistent clear spectrum to make it work really well with higher client counts. Forget WiFi for the moment - with 25 x 4Mb/s streams, you will need 100Mb/s of free Internet bandwidth as well.
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