Today Microsoft announced they will be increasing the maximum number of participants in a Teams private chat from 100 to 250 users in response to requests from customers. This change will be gradually rolled out around the globe from early to mid-May.
It is worth noting that if a user has more than 20 people in a chat, the following chat features are turned off automatically:
- Outlook automatic replies and Teams status messages
- Typing indicator
- Video and audio calling
- Screen sharing
- Read receipts
These limitations are already in place, and there is no change with this coming update.