@kimhoersted there is no way to do this from the ap/controller. This is usually done with a 3rd party tool (Purple WiFi, Meraki, or Cloud4Wi) for guest portal access. There are QoS/bandwidth setting you can do per user or per SSID and that can be found in the guide or just search for "Cisco EWC bandwidth limits" and you should find some useful docs. This does not put a quota on the max usage, that would be a 3rd party software.
-Scott
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