Microsoft says it will add a new Teams call handler beginning in January 2026 to reduce launch times and boost call performance for the Windows desktop client. A new process, ms-teams_modulehost.exe, ...

New child process ms-teams_modulehost.exe handles the calling stack separately to speed up Teams startup. The new process appears under ms-teams.exe in Task Manager and won't need any special setup.

Major Microsoft Teams Performance Update Rolling Out in January 2026 Your email has been sent Microsoft is splitting the Teams calling stack into a new background process on Windows to cut launch ...