You can now add guests to Microsoft Teams

by Volker Weber

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We’re starting to roll out the ability to add anyone as a guest in Microsoft Teams. This means that anyone with a business or consumer email account, such as, or others, can participate as a guest in Teams with full access to team chats, meetings and files. Previously, anyone with an Azure Active Directory (Azure AD) account could be added as a guest, and now anyone with an email address can be added to a team. All guests in Teams are covered by the same compliance and auditing protection as the rest of Office 365, and can be managed securely within Azure AD.

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This is a big and long-time coming feature. Have a lot of customers who were sitting on Teams rollouts until this came out.

John Head, 2018-02-28

This is the same half baked solution as for SharePoint Online: It is nice for B2B collaboration between Office 365 / AAD customers. However if the other end does not have Office 365 / AAD, the other end must use a Microsoft account (aka LiveId). If the other end does want that, you cannot collaborate.
The feature to add a custom Identity Provider for external users is still missing - it is not even possible to connect Microsoft's own AAD B2C CIAM solution.

Tobias Zuegel, 2018-03-01

If the "other end" is unable to get a free Microsoft ID, there won't be much collaboration, or will it?

Volker Weber, 2018-03-01

Schon länger angekündigt ist das ein echtes Key Feature, und funktioniert (zumindest in meinem Tenant) einwandfrei. Happy collaborating :-)

Ingo Harpel, 2018-03-01

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