Microsoft Office Ltsc Pro Plus 2021 [upd] [ 2025 ]

: Basic integration included for collaboration, though advanced features may require a separate subscription. Microsoft Learn Key Features and Differences Overview of Office LTSC 2021 - Microsoft Learn

If you buy LTSC Pro Plus 2021 today, you have roughly 1.5 years of mainstream support left (until late 2026) and 6 years of security-only patches (until 2031). This is acceptable for air-gapped machines but less ideal for general business desktops. microsoft office ltsc pro plus 2021