Join a team as a guest
If you receive a Microsoft Teams invitation to join a team, there are a couple of steps to accept the invitation.
Open the email invitation, and select Open Microsoft Teams. If you don't see the invitation, check your junk or spam folder.
If your email address has not previously been used to create a Microsoft account, you'll need to create one.
On the Create account dialog, select Next , create a password, and select Next.
To verify your email address, open the verification email, and copy the security code.
Enter your security code in the Verify email dialog, select Next , enter the CAPTCHA in the Enter the characters you see line, select Next , then Accept.
If you don't want to download the Microsoft Teams app, select Use the web app instead.
In the Teams web app you can view or reply to posts, or create your own posts, and select Files tab to view or edit team documents.
If you already use the Teams app in your organization joining a team as a guest is a lot simpler.
Just open Microsoft Teams app and choose Yes to switch to the team you are invited to. Now you can collaborate on the project in Teams.
To switch back to your company's team, select it from the Organization drop-down.