Hi @Victor Salvador
Is there at least one machine that can be connected to the Internet to download the update source?
If so, then you are able to let Office 2019 get updates from an external device (Such as USB) or shared folder in your internal network.
For more, please refer to "Configure where Office 2019 gets updates from".
- Please note, if there is no internal network either as the image shown above, you can download the Office installation files to one external device.
- Besides, under this case, we need to download the whole Office 2019 installation files as a update source. The newest build includes all the latest security and quality updates. Existing Office 2019 will figure out what’s different between the update source and it-self that’s installed on the computer to install.
To download the Office 2019, you can use ODT and configuration file (.xml file).
In addition, we can add "UpdatePath" to specify where to get security and quality updates from.
Any further issues, pleae let me know.
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