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Office Installation Errors

How to Add Publisher to an Existing Office 2021 LTSC Installation

Amos GikundaAmos Gikunda Oct 8, 2026 870 views

Question details

The user wants to install Microsoft Publisher into an already deployed Office 2021 LTSC environment.

How to Add Publisher to an Existing Office 2021 LTSC Installation
Product
Microsoft Office 2021 LTSC
Device & OS
not provided
Scenario
Modifying an existing Office deployment configuration to include a previously excluded application.
Observed behavior
Publisher is missing from the current Office suite because it was excluded in the initial deployment XML, and the user needs to add it without fully reinstalling.
Before you start

Ensure you have administrator privileges on your computer and locate the XML configuration file that was originally used with the Office Deployment Tool (ODT).

Solution 1Recommended

Update the Office Deployment Tool XML Configuration

Edit your existing deployment XML file to remove the Publisher exclusion and rerun the ODT setup.

By removing the specific exclusion tag for Publisher in your configuration file, the Office Deployment Tool will update your current installation seamlessly. You do not need to uninstall the rest of the Office suite first.

1
Locate the Configuration File

Open the folder containing your Office Deployment Tool (ODT) and the associated XML configuration file.

2
Edit the XML File

Right-click the XML file (typically named configuration.xml) and select 'Edit' to open it in Notepad or another text editor.

3
Remove the Exclusion Tag

Locate the line that reads <ExcludeApp ID="Publisher" /> and delete it entirely from the file.

4
Save Changes

Save the changes to the XML file and close your text editor.

5
Rerun the Setup

Open Command Prompt as an administrator, navigate to your ODT folder, and run the command: setup.exe /configure configuration.xml to apply the update and install Publisher.

No Uninstallation Required: The Office Deployment Tool will automatically detect the existing installation and only add the missing Publisher application without disrupting your other Office apps.
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Frequently Asked Questions

Do I need to uninstall Office 2021 LTSC before adding Publisher?

No, you do not need to uninstall your existing Office installation. Running the Office Deployment Tool with the updated XML file will simply append the missing Publisher application to your current setup.

Where can I find my Office Deployment Tool configuration file?

The XML configuration file is typically located in the same folder where you extracted the Office Deployment Tool (setup.exe) during your initial Office installation.

Why is Publisher missing from my Office 2021 LTSC installation?

Publisher may have been excluded during the initial deployment if the configuration file contained the <ExcludeApp ID="Publisher" /> tag, which instructs the installer to skip installing that specific application.