Joining Team (external users)
If you are invited as a Guest user to a Team you will receive invitation on your emails address. Open the invitation and click on Open Microsoft Teams.
You will be redirected to a page and asked to create a Microsoft account with your existing email address. Press Next and follow the on-screen instructions on adding password, country of residence and verifying the email address with the code Microsoft will send. If you don't receive the verification code in a couple of minutes please check the Spam/Junk folder in case the email landed there.
After verifying you will be asked to review and accept the permissions given to STP Ltd. After accepting you will be redirected to the page where you can download MS Teams for your operating system. After installing MS Teams you can log in with your account and collaborate with the team you were invited by.