Our company currently has a batch of Win10 operating system computers, installed Microsoft Office 2016, and plans to purchase Outlook 2024 for email upgrade. At the same time, Microsoft Office 2016 (word.excel.ppt.) is used on the same computer.

Walker Tessa 0 Reputation points
2026-08-28T08:22:11.3466667+00:00

Our company currently has a batch of Win10 operating system computers, installed Microsoft Office 2016, and plans to purchase Outlook 2024 for email upgrade. Will there be a conflict between keeping Microsoft Office 2016 (word.excel.ppt.) on the same computer at the same time? The company has tested Outlook LTSC 2024 internally and cannot be installed and used at the same time, is there any solution?

Microsoft 365 and Office | Install, redeem, activate | For business | Windows
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  1. Helen Luu 2,785 Reputation points Independent Advisor
    2026-08-28T11:06:31.9266667+00:00

    Hello @Walker Tessa

    Based on the information you provided, I understand that you are currently using Office 2016 and are planning to upgrade Outlook from Outlook 2016 to Outlook 2024. You would like to know whether running these versions together could cause any conflicts.

    According to Microsoft's documentation Install and use different versions of Office on the same PC | Microsoft Support, Microsoft states:

    "If you have a Microsoft 365 subscription or non-subscription version such as Office Home and Business 2021, 2019, or 2016, in most cases you can't run these versions together on the same computer."

    The article also provides recommendations, supported scenarios, and limitations regarding the use of multiple Office versions on the same PC. I recommend reviewing the guidance carefully to determine whether your planned setup is supported.Please note that even if you follow Microsoft's recommendations, there is still a possibility of encountering compatibility issues when running two different Office versions on the same computer.

    I hope this information is helpful. Please let me know if you need any further assistance.

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  2. AI answer

    2026-08-28T08:22:29.3866667+00:00

    Yes, there can be a conflict, and the tested result is consistent with Microsoft guidance.

    Outlook 2024 cannot generally be installed side-by-side with Office 2016 apps on the same computer when the Office installation technologies or suite versions conflict. Microsoft states:

    • If using the volume licensed MSI-based version of Outlook, two versions of Outlook cannot be installed together. The upgrade process normally removes the earlier version.
    • If moving from a volume licensed version to a subscription version that uses Click-to-Run, it is possible to have two versions of Outlook installed on the same computer in some migration scenarios, but Microsoft recommends only one version of Office on a computer and removing the older version as soon as possible.
    • Office installed with Click-to-Run and Windows Installer on the same computer is not supported.
    • Outlook bitness must match the bitness of the installed Office apps. A 32-bit Outlook cannot be installed with 64-bit Office apps already installed, and a 64-bit Outlook cannot be installed with 32-bit Office apps already installed.

    For the described scenario, the practical supported solution is:

    1. Uninstall Office 2016 from the computer.
    2. Install Office/Outlook 2024 as a matched, single-version deployment.
    3. Keep all Office apps on the same supported version and installation technology.

    If the goal is to keep Word, Excel, and PowerPoint 2016 while only upgrading Outlook to 2024, that is generally not a supported long-term configuration. Even where limited coexistence is technically possible in migration cases, Microsoft recommends only one Office version on the device.

    Important planning note:

    • Office 2016 is no longer supported.
    • Office 2019 is also no longer supported.
    • Office LTSC 2021 and Office LTSC 2024 are the supported perpetual commercial releases listed in the provided material.

    If testing showed Outlook LTSC 2024 cannot be installed together with Office 2016, the supported path is to upgrade the whole Office installation on those PCs instead of trying to keep Office 2016 apps beside Outlook 2024.

    References:

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