Skype will be launching group video calling for its iOS, Android and Windows 10 apps in the coming weeks, as a way to mark ten years since the service first launched (its first mobile app came out six years ago).

Users can pre-register online for a “sneak peek”.

An update to Microsoft’s Outlook apps for Android and iOS also sees the introduction of support for Skype calls in new calendar events – when this option is selected, Outlook will create a Skype call link and share with participants.

Skype said more than 750 million people have downloaded the app on their Windows Phone, Android and iOS devices and that overall the product has generated nearly two trillion minutes of free video calls.

“A lot has changed since 2006… We’ve brought you other ways to enjoy video with video messaging, real-time speech and instant message translation and group video calling – where we’ve seen a 10x growth in less than two years,” it said in a blog.

Skype’s desktop version allows for ten participants in a group chat but it did not disclose how many can be in one chat on the app.

It is worth noting that services like Google Hangouts and Oovoo have offered group chat for some time now.

In December, Microsoft acquired technology from Talko, maker of a business communication app, in a deal that saw Talko employees join the Skype team.

“Together, the new technology and talent will help us deliver great new features and capabilities in both Skype and Skype for Business,” Microsoft said.

In August last year, the company previewed iOS and Android versions of its Skype for Business app.