Sometimes you'll want to collaborate with people who aren't in your team’s organization. If you want to collaborate with them in Teams, you can add them as a guest. Guests have fewer capabilities than team members or team owners, but there's still a lot they can do. For a deeper look, see Guest capabilities in Teams.
Note:You must be a team owner to add a guest in Teams.Before guests can join a team, an admin must enable guest access in Teams.If you can't add a guest, check with your admin.
Add a guest to your team
Note:After you add a guest to a team, it may take a few hours before they have access. Guests outside your org will get an email with an invitation to join the team, and can only access the team after accepting the invitation.
To add a guest to your team in Teams:
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Select Teams
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Select More options
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Enter the guest's email address.Anyone with a business or consumer email account, such as Outlook, Gmail, or others, can join your team as a guest. Select their email again to confirm.
Note:If you receive a "We didn't find any matches" error while trying to add a guest, your organization doesn't allow guests.
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Add your guest's name by selectingAdd (name) as a guest?. Be sure to do this now—you’ll need the help of an IT admin to do it later.
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SelectAdd. Guests will receive a welcome email invitation that includes some information about joining Teams and what the guest experience is like.
Note:When you add a guest, only their name gets added to their profile card. To add or change other info (such as phone number or title), you'll need to contact your IT admin.
Identify guests on a team
You can tell if someone is a guest by looking anywhere their name appears—the word “Guest” appears after it. You can also see everyone’s roles in the Members tab of a team. Go to the team name, and select More options 
Switch guest accounts in Teams
Go to Account managerat the top-right of Teams, and then pick the team or guest account you want.
Guests are added to your organization's Azure Active Directory as B2B collaboration users. They must sign in to Teams using their guest account. If they normally use Teams with another Microsoft 365 organization, they need to switch organizations in Teams to interact with your organization.
Related topics
Set guest permissions for channels
To add a guest to your team in Teams:
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TapTeams
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TapMore options> Manage members
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Tap Add members
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Tap Invite as a guest , then tap the checkmark.Guests will receive a welcome email invitation that includes some information about joining Teams and what the guest experience is like.
