Cannot open the people microphone anymore

Hello,

A few days ago, we were able to open the microphones of any members in a meeting.

However, one of our partners changed something in the Zoom settings, and now this is no longer possible. We have to ask the members to open their microphones manually.

We've tried changing some of the settings, but without success. 😞

What do we need to do to restore this option?

Regards,