📧 How to Check Which Microsoft Outlook Version You Have

This Microsoft Support guide shows how to identify the exact version and build of Microsoft Outlook you're using — whether on Windows, Mac, web or mobile. Useful when troubleshooting, updating or checking compatibility with add‑ins and services.

🪟 Windows Outlook — Classic vs New

Outlook for Windows now exists in two main forms: the new redesigned Outlook and the classic desktop version.

  • 🆕 New Outlook: has a Settings button in the top‑right and a simplified ribbon.
  • 📇 Classic Outlook: traditional Office desktop app included with Microsoft 365 and standalone Office suites.

To check your Outlook version on Windows:

  1. Open Outlook and choose File.
  2. Select Office Account (or Help in older builds).
  3. Click About Outlook — version and build appear in the popup.

🍏 Outlook on Mac

For Outlook on macOS, open the app and choose Outlook > About Outlook from the top menu bar. The popup shows the version and build number.

🌐 Web & Mobile Versions

If you're using the web version at Outlook.com or the mobile app (iOS, Android), the app version may appear in the account settings or in the app details in your device’s app store.

📌 Why Knowing Your Outlook Version Matters

  • ✅ Ensures compatibility with Microsoft 365 services and updates.
  • 🔌 Helps determine whether add‑ins and features are supported.
  • 🛠 Useful when troubleshooting errors or requesting support.

Older unsupported versions (like very old Office editions) may not connect to Microsoft 365 email servers or receive security updates.