Clarification Required on OS Requirement for Outlook 2016 (KB5002747) update

Hi @Haritha Duraisamy,

Thank you for reaching out with your query regarding the OS requirements for the Outlook 2016 update (KB5002747). I understand the need to validate compatibility before proceeding with deployment, and I’m happy to clarify based on the available information.

To clarify, Windows 11 is not explicitly listed as a supported operating system for the KB5002747 package on the official download page. The documented supported operating systems for this update are limited to Windows 10, Windows 8.1, and certain Windows Server versions.

Because of this, Windows 11 is not formally declared or validated as a supported OS for this specific update package.

Although Outlook 2016 applications may still run on Windows 11, and the update might install and function without issues, this scenario falls outside the officially documented support boundaries. As a result, Microsoft does not provide explicit assurance or testing coverage for this update on Windows 11 environments.

In summary:

• Windows 11 is not officially listed as supported for KB5002747
• The update is validated only on the operating systems specified in the download documentation
• If you’d like to test this on your device, please note that it is considered unsupported from a documentation standpoint

This update also:

• Requires Outlook 2016 (MSI version) to already be installed
• Not applicable to Click‑to‑Run (Microsoft 365 Apps)
• May require a system restart after installation

Please be aware that Microsoft Office 2016 is no longer supported as of October 14, 2025. Following this date, Microsoft does not provide security patches, updates, or technical support. Deploying or continuing to use Office 2016, should be carefully evaluated, as it may result in security exposure and compatibility limitations in modern environments.

Given this, it would be advisable to treat Windows 11 deployments with this update as best-effort and ensure appropriate testing is completed before broader rollout.

I hope this helps with your validation. Please feel free to reach out if you need further assistance or guidance.

Kind regards,

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