The support period for Microsoft 365 Apps for enterprise depends on both the version of the apps and the Windows 10 version they’re running on. Microsoft bases this on historical compatibility and performance data.

🧭 Key Points:

• Microsoft 365 Apps for enterprise is developed based on Office 2016.
• Older versions of the apps (e.g., 1903, 1809) are supported on earlier Windows 10 builds, including 21H2, 20H2, and even 1709.
• The term “Windows 10” in Microsoft’s public documentation refers only to versions currently within the support lifecycle.
• The support period indicates the timeframe during which operation is guaranteed, but it may vary and is not always consistent across versions.

📚 Reference Documentation:

• Windows 10 Release Information
• Microsoft 365 Apps Update History (List by Date)