How to Update Office 2019 on an Air-Gapped Computer
Question details
The user needs to update a Click-to-Run installation of Microsoft Office 2019 on a computer that is permanently disconnected from the internet.
- Product
- Microsoft Office 2019
- Device & OS
- Windows
- Scenario
- Updating Office software in a highly secure, completely offline network environment (air-gapped system).
- Observed behavior
- Standard Windows Update KB packages fail to install Office updates because the software uses a Click-to-Run architecture requiring direct connection to the Office CDN.
Ensure you have access to a separate, internet-connected computer and a USB flash drive with sufficient storage space to transfer the installation files.
Update Office 2019 Using the Office Deployment Tool (ODT)
Use the official Office Deployment Tool to download the necessary update files on an online computer, then transfer them via USB to your isolated network.
Windows KB packages do not update Office Click-to-Run installations. To update Office 2019 on an air-gapped PC, you must manually fetch the latest build from the Office Content Delivery Network (CDN) using the Office Deployment Tool, and then configure the offline machine to read those downloaded files from a local source.
On your internet-connected computer, download the Office Deployment Tool from the official Microsoft Download Center and extract it to a local folder.
In the extracted folder, create or modify a 'download.xml' file to specify the exact Office 2019 version, bit-architecture, and language you need to update.
Open Command Prompt as an administrator, navigate to your ODT folder, and run the command 'setup.exe /download download.xml'. Wait for the tool to download the Office source files to the specified directory.
Copy the entire ODT folder—including setup.exe, the XML configuration files, and the newly downloaded 'Office' folder—onto your USB flash drive and move it to the air-gapped computer.
Connect the USB drive to the air-gapped PC. Modify the 'configure.xml' file so that the SourcePath points to the USB drive's drive letter. Finally, run 'setup.exe /configure configure.xml' via Command Prompt to install the updates.
Looking for a Hassle-Free Offline Office Suite?
Deploying and updating Click-to-Run Office installations on air-gapped computers requires complex command-line configurations. WPS Office offers a straightforward standalone installer that needs no deployment tools, making it an ideal solution for secure, disconnected environments.
- 1. Download the standalone installer: Visit the WPS Office website from an online PC and download the full offline installation package.
- 2. Transfer to your secure network: Save the installer to a USB flash drive and plug it into your air-gapped computer.
- 3. Install with one click: Double-click the installer on your offline PC to set up the fully featured office suite in minutes.
Frequently Asked Questions
Can I use Windows KB update packages to update Office 2019 offline?
No. Office 2019 utilizes a Click-to-Run architecture rather than the older MSI-based installer. Windows Update KB packages do not apply to Click-to-Run installations, requiring you to use the Office Deployment Tool instead.
Why doesn't my disconnected server automatically fetch Office updates?
A disconnected server cannot reach the internet to communicate with the Office Content Delivery Network (CDN). Updates must first be manually downloaded on an internet-connected PC and physically transferred via USB before the local server can host them.
How large are the Office 2019 offline update files?
The complete source files for Office 2019 can be several gigabytes in size. Make sure your USB flash drive has at least 5 to 10 GB of free space before beginning the download process.
