https://www.bleepingcomputer.com/news/microsoft/microsoft-teams-reaches-44m-daily-users-after-12m-weekly-gain/

Microsoft announced today that its Teams collaboration service experienced a huge usage spike with 12 million new daily active users being added within the last seven days, bringing the total to 44 million.

The newly added Microsoft Teams users are already behind more than  900 million call and meeting minutes each day during the last week.