I suggest you download the installation package via ODT and configuration file (.xml) on a computer with Internet connection. Then you can copy the installation files to the devices offline.
- Create a folder, we may call it "Test".
- Download the ODT, then run the self-extracting executable file in Test folder.
- Create a new .xml file like following one, we may call it "O2019.xml".
<Configuration>
<Add OfficeClientEdition="64">
<Product ID="ProPlus2019Retail">
<Language ID="en-us" />
</Product>
</Add>
</Configuration>
Run the Command Prompt as an administrator, then enter: cd <Test folder path>
to navigate to the Test folder;
Then enter: setup.exe /download O2019.xml
to download the Office 2019 installation file.
(This process takes a while. When the path to the Test folder appears in front of a separate cursor, it means the download is complete. The Office folder is about 2GB in size. ODT will access Microsoft's CDN, automatically check for the latest version of Office 2019, and then download the complete installation file.)
Copy the entire Test folder (Office installation package, setup.exe and O2019.xml file) to the device that need to install Office 2019. Do not change the name of the Test folder, the folder path can be changed.
Run the Command Prompt as an administrator again on this device offline, enter the command: cd <Test folder path>
;
Locate the Test folder, and then enter: setup.exe /configure O2019.xml
to install.
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