Upgrade Office 2019 to Office 365 subscription?

Eaven HUANG 2,156 Reputation points

Dear Experts,

We have some PCs running Office 2019 which are activated by using on-premises KMS server. We now have some Office A3 license for users to activate Office 365.
The practice we took was to uninstall Office 2019 first then install Office 365.

Is there an easier way that we can upgrade Office 2019 to Office 365 directly?
When user accesses new Office 365 for the first time, they can go ahead to use their account to activate the product?

Thanks a lot!

Office Management
Office Management
Office: A suite of Microsoft productivity software that supports common business tasks, including word processing, email, presentations, and data management and analysis.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Ceasar Chen_MSFT 4,391 Reputation points

    Hi, @Eaven HUANG
    One way to try is that you can download the Office Deployment Tool and use the Remove element in configuration.xml to uninstall Office2019, which will uninstall Office2019 when installing Office365. You can refer to this article on how to deploy using ODT and configuration.xml: office-deployment-tool-configuration-options.
    For users to log in to Office and use their accounts to activate, you need to log in to office-365-administrationto assign Office365 licenses to users.

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  2. Eaven HUANG 2,156 Reputation points

    Dear @Ceasar Chen_MSFT ,

    I didn't get a chance to test it yet, I will update you as soon as I get the chance.

    Thanks a lot for follow-up and sorry for the late response.

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