Skype, the Microsoft-owned service that popularized making calls over the internet, is hanging up for good. In May, Microsoft will shut down Skype, which it bought in 2011 for $8.5 billion in what at the time was the biggest acquisition in the tech titan’s history.

Microsoft is pivoting to support Teams instead. Microsoft 365 head Jeff Teper encouraged Skype users to migrate their Skype contacts to Teams.

Microsoft is shutting down Skype, the service that once helped put video calling on the map. The company announced on Friday it is retiring Skype in May as part of a broader effort to focus on Microsoft Teams, its conference call service, and to streamline its free consumer communications offerings.