You can add or invite anyone outside of your Teams org who uses Teams. Anyone with a business or consumer email account, such as Outlook, Gmail, or others, can participate as a guest in Teams
To add a guest to your team in Teams:
- Select Teams. and go to the team in your team list.
- Select More options. > Add member.
- Enter the guest's email address.
- Add your guest's name. Select Edit guest information
and type a friendly name for them. Be sure to take the time to do this now, you'll need the help of an IT admin to do it later.
- Select Add. Guests should receive a welcome email invitation that includes some information about joining Teams
.