“One of the ways we continue to improve is by consistently introducing rich features, like voice and video calling, games, and bots for Messenger.
Using older versions of apps means that experiences won’t work well or sometimes not at all.” The company says it has “reached out” to those affected and is also offering suggestions in Messenger to people about to lose access.
Facebook was founded in 2004 by Mark Zuckerberg, then a freshman at Harvard.
Facebook Messenger is the latest in a line of apps to desert Windows Phones after Microsoft has struggled to compete with Apple and Android devices in recent years.
Millions of people use the service daily to connect with friends and family.
Users also can chat with their friends using Facebook Messenger, another popular app on Windows Phone.
The full list of devices about to lose support from Facebook includes: v55 of the Facebook app and Messenger v10 on Android, Facebook for i Pad v26, Messenger v8 for i OS and Facebook for i OS released in 2011, Facebook for Windows Phone, Messenger for Windows Phone 8 and 8.1, and Facebook for Windows 8 and the 8.1 desktop app.
Facebook's popular Messenger app will be cut from a huge number of Windows phones this week.