Hi @anton.skvortsov @assistenza
JWT Apps are used account wide, so anyone on the account can host meetings. Right now Zoom does not support host to run concurrent meetings[1] regardless of platform. An option would be to obtain the right amount of host license to make sure that concurrent meetings do not happen between host schedule meetings.
We do offer per minute, non host license meetings via our ISV program[2] if you’re interested in going that route.
1 - https://support.zoom.us/hc/en-us/articles/206122046-Can-I-Host-Concurrent-Meetings-
2 - https://sites.google.com/zoom.us/isv/partners
Let us know if this works