How to Install Project 2019 Volume License Alongside Microsoft 365
Question details
The user is trying to deploy Project 2019 Volume License but receives an error prompt asking to uninstall Microsoft 365 first.
- Product
- Microsoft Project 2019
- Device & OS
- not provided
- Scenario
- Running an installation script or batch file with an XML configuration to install Project 2019 on a system that already has Microsoft 365 installed.
- Observed behavior
- The installer halts and displays a prompt to uninstall Microsoft 365 because the products use incompatible architectures, update channels, or installation technologies.
Verify whether your currently installed Microsoft 365 is 32-bit or 64-bit, as the Project 2019 installation architecture must match it exactly.
Use the Office Deployment Tool with Proper XML Configuration
Resolve the installation conflict by aligning the architecture and update channels using the Office Deployment Tool (ODT).
Microsoft Office products installed on the same computer must share the same installation technology (like Click-to-Run) and architecture (32-bit or 64-bit). If there is a mismatch, the installer forces you to uninstall the existing suite.
To bypass this limitation for Volume License products, you must use the Office Deployment Tool with an appropriately configured XML file.
Download and extract the latest Office Deployment Tool (ODT) executable from Microsoft to a local folder.
Open your project.xml file in a text editor. Ensure that the architecture (32-bit or 64-bit) matches your Microsoft 365 installation perfectly, and configure it to use a compatible Click-to-Run channel such as PerpetualVL2019.
Ensure the extracted ODT setup.exe and your custom project.xml file are placed in the exact same local directory.
Open Command Prompt as an administrator, navigate to the folder containing your ODT files, and run the command 'setup.exe /configure project.xml' directly instead of relying on batch scripts.
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Frequently Asked Questions
Why does the Project 2019 installer ask me to uninstall Microsoft 365?
This happens when the Microsoft 365 installation and the Project 2019 installation use different technologies (such as MSI vs. Click-to-Run) or have conflicting architectures (like mixing 32-bit and 64-bit applications on the same PC).
Can I run a 32-bit Project 2019 with 64-bit Microsoft 365?
No. All Microsoft Office products installed on the same computer must share the exact same bit architecture. You must install the 64-bit version of Project 2019 if you currently have a 64-bit Microsoft 365 environment.
How do I check my Microsoft 365 architecture?
Open any Office app like Word, click on 'File', select 'Account', and click 'About Word'. The top line of the dialog box will display whether it is a 32-bit or 64-bit installation.
What is the Office Deployment Tool (ODT)?
The Office Deployment Tool is a command-line utility provided by Microsoft that allows administrators to download and deploy Click-to-Run versions of Office, Project, and Visio to client computers using a customizable XML file.
