The evergreen distribution model also comes with security benefit of providing the latest and most secure runtime for embedding apps. This saves storage space on the user’s device by sharing WebView2 instance between multiple embedding applications. This means WebView2 runtime updates with Edge browser and independently of the Teams client, and it can be shared across multiple embedding applications (for example, Teams and Outlook). Both Electron and WebView2 are ultimately based on the same Chromium browser engine, but switching to WebView2 allows the new Teams to benefit from various efficiencies.įor example, the new Teams on Windows leverages WebView2 in evergreen distribution model. One of the most significant architectural changes in the new Teams is the move from Electron to Edge WebView2. The new Teams relies on App Installer for installations and will install in a privileged location, where non-administrator users cannot tamper with its executable files.įaster updates with Edge WebView2 runtime While installing in the user profile is convenient and does not require elevated privileges, it also makes common post-exploitation activities, such as maintaining persistence, easier. We are also moving away from installing Teams in the user profile. This greatly reduces risk surface and maintenance cost compared to using a custom installer and updater. Instead, it now leverages MSIX packages and App Installer that are both natively supported by Windows. The new Teams no longer relies on bespoke solutions for deployment and updates. In this blog post, we will describe some of the security improvements this new Teams version brings. For an overview of architectural changes in the new Teams, read “Advantages of the new architecture”. Microsoft has recently announced a new version of the Microsoft Teams desktop app.
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