Conversations textuelles entre utilisateurs disposant d’un historique pouvant faire l’objet d’une recherche dans Microsoft Teams Gratuit
Hi, thanks for reaching out. To help, I need to know if your participants are external guests or people in your Microsoft account family. In Microsoft 365 Personal, chat in Teams meetings is limited for external participants and can’t be fully controlled like in business plans.
You can check “Meeting options” after scheduling the meeting in Teams and make sure “Allow meeting chat” is set to “In-meeting only” or “Enabled,” but external chat may still be restricted.
If you want everyone, including guests, to chat freely, I suggest using a Microsoft 365 Business or Enterprise plan.