First thing to know, you must be a team owner to add a guest in Teams (see also Set guest permissions).
Collaborating with users not in your Organization can be accomplished by adding them as guest users. Guest users will have fewer capabilities, but there is still a lot they can do.
Note: 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. You can submit a support ticket for technical help here.
Here's how to add a guest and work with them in Teams.
Add a guest to your team
Guests must have an Office 365 work or school account. If the guest doesn’t yet have a Microsoft account associated with their email address, they will be directed to create one for free.
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. Anyone with a business or consumer email account, such as Outlook, Gmail, or others, can join your team as a guest.
Note: If you receive a "We didn't find any matches" error while trying to add a guest, your organization doesn't allow guests.
-
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.

-
Click Add. Guests will receive a welcome email invitation that includes some information about joining Teams and what the guest experience is like.
Now that all that's done, the next thing you're going to do is set guest permissions.
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
To see if a team has any guests, just look below the heading where the team name shows up.

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
> Manage team and then Members.
Switch guest accounts in Teams
Go to the accounts menu to the left of a profile picture at the top of the app, then pick the team or guest account you want. For example, if you are a normal Keene user, you will need to select the University of New Hampshire guest account.
Guest Capabilities
Every member in Teams has a role, and each one has different permissions.
-
Owners
Team owners manage certain settings for the team. They add and remove members, add guests, change team settings, and handle administrative tasks. There can be multiple owners in a team.
-
Members
Members are the people in the team. They talk with other team members in conversations. They can view and usually upload and change files. They also do the usual sorts of collaboration that the team owners have permitted.
-
Guests
Guests are people from outside of your organization that a team owner invites, such as partners or consultants to join the team. Guests have fewer capabilities than team members or team owners, but there's still a lot they can do.
Note: File permissions for members and guests reflect whatever your admin has set in your SharePoint settings. These can only be changed by your admin.
The following table shows the capabilities available for each role:
Capability
|
Owner
|
Member
|
Guest
|
Create a channel
|

|

|

|
Participate in a private chat
|

|

|

|
Participate in a channel conversation
|

|

|

|
Share a channel file
|

|

|

|
Share a chat file
|

|

|
|
Add apps (such as tabs, bots, or connectors)
|

|

|
|
Can be invited via any work or school account for Office 365
|
|
|

|
Create a team
|

|

|
|
Delete or edit posted messages
|

|

|

|
Discover and join public teams
|

|

|
|
View org chart
|

|

|
|
Add or remove members and guests
|

|
|
|
Edit or delete a team
|

|
|
|
Set team permissions for channels, tabs, and connectors
|

|
|
|
Change the team picture
|

|
|
|
Add guests to a team
|

|
|
|
Auto-show channels for the whole team
|

|
|
|
Control @[team name] mentions
|

|
|
|
Allow @channel or @[channel name] mentions
|

|
|
|
Allow usage of emoji, GIFs, and memes
|

|
|
|
Renew a team
|

|
|
|
Archive or restore a team
|

|
|
|
Need more help?
LinkedIn Learning - Microsoft Teams