Microsoft Office Ltsc Professional Plus 2021 Iso Download Top May 2026

| Feature | Office LTSC 2021 | Microsoft 365 | | :--- | :--- | :--- | | Licensing | Perpetual (one-time purchase) | Monthly/Yearly subscription | | Cloud Storage | None (local only) | 1 TB OneDrive | | AI & Collaboration | No real-time co-authoring | Yes (Copilot, real-time sync) | | Support Lifecycle | 5 years (fixed) | Continuous updates | | Target User | Offline, regulated, industrial | Dynamic business / Home users |

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