If you are using a Windows PC you can either click the link in the invitation which has been sent and follow the instructions on screen - if it opens in Internet Explorer or Google Chrome there is no need to install a program.
Or download the free Microsoft Teams application by visiting www.microsft.com/teams and following the onscreen instructions.
Apple iOS Device
If you are using an Apple Device such as an iPad or iPhone, please visit the App Store and download the Microsoft Teams App.
If you are using an Apple Mac device you will need to visit the MacOS App Store.
At present Microsoft Teams is not 100% supported by Safari on MacOS.
If you are using an Android Device please visit the Google Play store to download the app.