Microsoft recently added the ability to include external users, called guests, in Teams. This functionality needs to be enabled in the tenant before users can add guests to the teams. Here’s how to enable it as well as a look into the differences between a regular user and a guest user.
Log in to your Office 365 tenant with a global admin account. Go to Settings > Services & add-ins > Microsoft Teams.
Go to Settings by user/license type and from the dropdown select Guest instead of Business & Enterprise. Flip the switch for “Turn Microsoft Teams on or off for all users of this type” to On.
Microsoft Teams relies on SharePoint Online/OneDrive for Business to store files and documents for channels and chat conversations and Office 365 groups to store team’s membership info. In order to enable the full Microsoft Teams guest user access experience you should also enable a couple of more settings.
In SharePoint Online Admin Center > Sharing > Sharing outside your organization: Make sure sharing is turned on. This means any other option than Don’t allow sharing outside your organization.
In Services & add-ins > Office 365 Groups: Turn on Let group members outside the organization access group content and Let group owners add people outside the organization to groups.
Congrats, your Teams owners and admins can now add guest users to Microsoft Teams!
Guest user requirements
At this time all guest users must have an email address corresponding to an Azure Active Directory og Office 365 work or school account.
Regular user vs. guest user
The main differences in Microsoft Teams between a normal user and a guest user is summarized in the table below.
|Capability in Teams||Teams user in the organization||Guest user|
|Create a channel
Team owners control this setting.
|Participate in a private chat|
|Participate in a channel conversation|
|Post, delete, and edit messages|
|Share a channel file|
|Share a chat file|
|Add apps (tabs, bots, or connectors)|
|Create tenant-wide and teams/channels guest access policies|
|Invite a user outside the Office 365 tenant’s domain|
|Create a team|
|Discover and join a public team|
|View organization chart|