75% of organizations deployed Microsoft Teams without proper governance or security in place, leaving them vulnerable to internal and external threats. Just 28% check the settings and membership of Microsoft Teams, to identify potential risks. Only 25% remove guest users, in addition to 22% who can determine who has access to specific data for audits, and the mere 13% can restore individual files deleted for a year or longer. Only 3% of companies do not leverage Teams today, despite the over 145 million daily active Teams users Microsoft recently announced.
Source: https://www.helpnetsecurity.com/2021/06/09/organizations-using-microsoft-teams/