The meeting itself
alfaview
Capacity is published per tier (100/300/500 per room) with 50 breakout rooms, simultaneous screen sharing, polling and whiteboard — that clears what most teams need. But the evidence is silent on host moderation, waiting rooms, and behaviour on a constrained connection; I cannot tell you who can be ejected from a call or whether it degrades gracefully.
Microsoft Teams
The captured pages publish capacity of 300 participants and 30-hour meeting duration across all three plans, with meetings, events, phone and rooms named as solution areas and apps usable before, during and after a meeting. But we found no public information on screen sharing, breakout rooms, host moderation or how the call behaves on a constrained connection, so scale is documented while the meeting's everyday mechanics are not.