Microsoft is releasing the ability to add anyone as a guest in Microsoft Teams. This means that users with a business or consumer email account can participate as a guest in Teams with full access to team conversations, 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.
In Teams, the content and activities of guest users are covered under the same auditing protection as the rest of Office 365. Guest accounts are added and securely managed within Azure AD through Azure AD business-to-business collaboration. This enables enterprise-grade security, such as conditional access policies for guest user access.
Azure AD also uses adaptive machine learning algorithms and heuristics to detect anomalies and suspicious incidents, enabling mitigation or remediation actions, such as multi-factor authentication, to be triggered as appropriate.
In addition, with Azure AD, IT departments have insight into the activities of external users in their organisation through detailed sign-in and access reports. Admins can centrally manage how guests participate within their Office 365 environment and view, add, or revoke a guest’s access to the host tenant.