Secured Users
Like in any application, to protect a user's Microsoft Teams messages, the user must have one of the supported licenses. For more information, see Minimum License Requirements to Activate SaaS Applications.
Email Security does not protect messages sent by users and sent from external parties to users without a supported license. Also, these messages do not appear in the Email Security Administrator Portal.
If Email Security detects users with unsupported Microsoft Teams licenses, it shows the status on the Overview page.
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If there are no users with a supported license, Email Security shows an error indicator that Microsoft Teams is not secured.
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If there are some users with unsupported licenses, Email Security shows a warning indicator that some of the users are not protected.