This guide shows you exactly how to download, install, and customize Microsoft Office 2021 LTSC using the Office Deployment Tool (ODT) and the Office Customization Tool (OCT). Copy the XML template, run the commands, and deploy with confidence.
Office 2021 LTSC provides long-term stability with a fixed feature set.
ODT handles downloading and installing via XML configuration.
OCT simplifies XML generation through a web interface.
Together, they allow controlled, repeatable deployments for individuals and businesses.
Official resources:
Download Office Deployment Tool (ODT) ·
Open Office Customization Tool (OCT) ·
Office LTSC Overview
C:\ODT).Tip: Use a short folder path like C:\ODT to avoid long-path issues.
You can either manually create the XML or generate it using OCT.
Create a file named configuration.xml inside C:\ODT:
<Configuration>
<Add OfficeClientEdition="64">
<Product ID="ProPlus2021Volume">
<Language ID="en-us" />
</Product>
</Add>
<Display Level="Full" AcceptEULA="TRUE" />
<Updates Enabled="TRUE" />
<RemoveMSI />
</Configuration>
C:\ODT.Tip: OCT reduces XML configuration errors.
cd /d C:\ODTsetup.exe /download configuration.xmlsetup.exe /configure configuration.xmlThe download runs silently. Monitor folder size or network usage.
After installation:
Office will confirm activation once successful.
Large downloads may take time. Run as Administrator and ensure firewall/proxy does not block Microsoft servers.
Verify Language ID and product ID in XML. Re-run configure command.
Ensure <RemoveMSI /> is included to remove MSI-based versions.
Yes. After downloading files with ODT, installation can run offline.
Yes. Add <ExcludeApp ID="Access"/> in XML.
No, but it simplifies XML creation and reduces errors.
Office Deployment Tool (ODT) ·
Office Customization Tool (OCT) ·
Office LTSC Overview
