Cannot install Office The configuation file was not specified

Hello Richard Nicholas,

Could you clarify where you downloaded or obtained the setup.exe that you are running, and which Office version or license you are trying to install, for example Microsoft 365 Personal/Family or an Office LTSC/volume-license edition?

If this is the Office Deployment Tool (ODT), Microsoft documents that setup.exe needs to be run from the command line with a configuration XML file, for example setup.exe /configure configuration.xml.

If you are simply trying to install Microsoft 365 Personal/Family normally, then the ODT configuration-file approach may not apply.

Also, where exactly are you seeing the “Chat init request failed: 500” message? That may be a separate issue, so knowing what application or page produces it would help narrow this down.

Hi @Richard Nicholas

The screenshot appears to contain two separate errors, so troubleshoot them independently.

The message:

Invalid UPN format. UPN should follow username@domain format.

Current Value: 18583954114

indicates that whatever is initiating that chat/account request is passing a numeric value where a User Principal Name (UPN), such as ******@contoso.com, is expected. Don't use that numeric value as your Microsoft 365 username.

The Office installation message "The configuration file was not specified" is different. If you're installing Office using the Office Deployment Tool (ODT), setup.exe must be given an XML configuration file describing which Office product, architecture, language, and channel to install.

If you simply double-clicked setup.exe, try opening Command Prompt as Administrator, change to the folder containing the Office Deployment Tool and configuration XML, and run: setup.exe /configure configuration.xml

Replace configuration.xml with the actual filename if yours is different. A matching Microsoft Q&A case for Office LTSC 2024 was resolved using this method.

Before running it, you can use dir and confirm that you can see both files, for example:

setup.exe

configuration.xml

Also make sure Windows isn't hiding the extension and that the file hasn't accidentally been saved as configuration.xml.txt.

If you don't have an XML file, don't create one by guessing the settings. For an organization/volume deployment, use Microsoft's Office Customization Tool to generate the configuration appropriate for your Office product and licensing. The usual ODT workflow is then:

setup.exe /download configuration.xml

setup.exe /configure configuration.xml

If, however, you're installing a normal Microsoft 365 Personal/Family or retail Office purchase, please tell us where you obtained this setup.exe. You normally shouldn't need to manually create an ODT XML file for a standard consumer installation.

Also, could you clarify where the “Chat init request failed: 500” message appears? For example, is that displayed on a Microsoft support webpage, inside the Microsoft 365 admin center, or by the Office installer itself? That will help separate the UPN problem from the Office installation problem.

Please don't post your full email address, tenant ID, product key, or other account information publicly.

Reference:

Microsoft Q&A - Office LTSC 2024 configuration-file installation error

Help make this community better for everyone: If this answer helped or resolved your issue, please accept it or upvote it. If not, share more details in a comment so we can continue the discussion and find the right solution. Thank you.