Microsoft reportedly bans its employees from using Slack for security reasons and encourages them to to use the Microsoft Teams app instead

https://www.businessinsider.com/microsoft-reportedly-bans-employees-from-using-slack-2019-6

Microsoft does not allow its employees to use Slack, GeekWire’s Nat Levy and Todd Bishop reported, citing an internal document.

While Microsoft has a rival workplace chat app, Microsoft Teams, the tech company reportedly cites security risks as the reason for its internal Slack ban.

Slack named Microsoft as its primary competitor in a regulatory filing sent to the Securities and Exchange Commission in April, and Microsoft listed Slack among its competitors in its most recent annual report.