Before downloading, ensure your device meets the minimum requirements:
If you are an individual user:
Command line example for ODT:
<Configuration>
<Add OfficeClientEdition="64" Channel="PerpetualVL2021">
<Product ID="ProPlus2021Volume" PIDKEY="YOUR-VL-KEY-HERE">
<Language ID="en-us" />
</Product>
</Add>
</Configuration>
First, let's decode the name:
Key difference from Microsoft 365: No cloud features, no real-time collaboration, no perpetual feature updates. But you own it permanently (for that major version).
There is no public “click to download” link on Microsoft.com for LTSC. You need access to one of these Microsoft portals: Before downloading, ensure your device meets the minimum
Q: Can I download the ISO directly from Microsoft without a business account? A: No. The trial ISO is available, but the full product requires a Volume License agreement. You cannot buy a single copy of LTSC as an individual consumer.
Q: Is Office LTSC 2021 compatible with Windows 11? A: Yes. It is fully supported on Windows 11 Enterprise and Pro.
Q: How long will I receive security updates? A: Mainstream support ends October 14, 2026. Extended support ends October 14, 2031 (5 years from general availability).
Q: My ISO download is slow from VLSC. Any fix?
A: Microsoft throttles single connections. Use a download manager (like Internet Download Manager) with 8 segments, or use the AzCopy command-line tool recommended by Microsoft.
This is the primary source. If your organization has purchased a Volume License agreement (Open, Enterprise, Select Plus): If you are an individual user:
Microsoft Office LTSC (Long-Term Servicing Channel) Professional Plus 2021 is a perpetual-license, on-premises release of Office for commercial customers who need fixed features and long-term support rather than the continuous updates of Microsoft 365. It includes the core Office apps and enterprise features suitable for organizations that can't or won't use cloud-connected, subscription services.
Best for advanced users who need a specific configuration or cannot access VLSC.
Microsoft provides a free tool to download Office installations directly from their CDN. This creates an "offline installer" similar to an ISO.
Step 1: Download the Tool
Download the Office Deployment Tool from the official Microsoft website. Run the executable to extract the files (setup.exe and configuration XML files) to a folder on your desktop.
Step 2: Create the Configuration File
Delete the default XML files provided. Create a new text file named configuration.xml and paste the following code: run:
setup.exe /configure configuration.xml
<Configuration>
<Add SourcePath="c:\temp\office2021" OfficeClientEdition="64" Channel="PerpetualVL2021">
<Product ID="ProPlus2021Volume">
<Language ID="en-us" />
</Product>
</Add>
</Configuration>
Note: You can change OfficeClientEdition to "32" if required and Language ID to your preferred locale.
Step 3: Download the ISO Files
Open Command Prompt as Administrator. Navigate to the folder where you extracted the ODT files.
Run the following command:
setup.exe /download configuration.xml
This will download the actual Office files to the path specified in the XML (e.g., c:\temp\office2021).
Step 4: Install
Once the download is complete, run:
setup.exe /configure configuration.xml
Before downloading, ensure your device meets the minimum requirements:
If you are an individual user:
Command line example for ODT:
<Configuration>
<Add OfficeClientEdition="64" Channel="PerpetualVL2021">
<Product ID="ProPlus2021Volume" PIDKEY="YOUR-VL-KEY-HERE">
<Language ID="en-us" />
</Product>
</Add>
</Configuration>
First, let's decode the name:
Key difference from Microsoft 365: No cloud features, no real-time collaboration, no perpetual feature updates. But you own it permanently (for that major version).
There is no public “click to download” link on Microsoft.com for LTSC. You need access to one of these Microsoft portals:
Q: Can I download the ISO directly from Microsoft without a business account? A: No. The trial ISO is available, but the full product requires a Volume License agreement. You cannot buy a single copy of LTSC as an individual consumer.
Q: Is Office LTSC 2021 compatible with Windows 11? A: Yes. It is fully supported on Windows 11 Enterprise and Pro.
Q: How long will I receive security updates? A: Mainstream support ends October 14, 2026. Extended support ends October 14, 2031 (5 years from general availability).
Q: My ISO download is slow from VLSC. Any fix?
A: Microsoft throttles single connections. Use a download manager (like Internet Download Manager) with 8 segments, or use the AzCopy command-line tool recommended by Microsoft.
This is the primary source. If your organization has purchased a Volume License agreement (Open, Enterprise, Select Plus):
Microsoft Office LTSC (Long-Term Servicing Channel) Professional Plus 2021 is a perpetual-license, on-premises release of Office for commercial customers who need fixed features and long-term support rather than the continuous updates of Microsoft 365. It includes the core Office apps and enterprise features suitable for organizations that can't or won't use cloud-connected, subscription services.
Best for advanced users who need a specific configuration or cannot access VLSC.
Microsoft provides a free tool to download Office installations directly from their CDN. This creates an "offline installer" similar to an ISO.
Step 1: Download the Tool
Download the Office Deployment Tool from the official Microsoft website. Run the executable to extract the files (setup.exe and configuration XML files) to a folder on your desktop.
Step 2: Create the Configuration File
Delete the default XML files provided. Create a new text file named configuration.xml and paste the following code:
<Configuration>
<Add SourcePath="c:\temp\office2021" OfficeClientEdition="64" Channel="PerpetualVL2021">
<Product ID="ProPlus2021Volume">
<Language ID="en-us" />
</Product>
</Add>
</Configuration>
Note: You can change OfficeClientEdition to "32" if required and Language ID to your preferred locale.
Step 3: Download the ISO Files
Open Command Prompt as Administrator. Navigate to the folder where you extracted the ODT files.
Run the following command:
setup.exe /download configuration.xml
This will download the actual Office files to the path specified in the XML (e.g., c:\temp\office2021).
Step 4: Install
Once the download is complete, run:
setup.exe /configure configuration.xml
