Command-line arguments for silent installation and mpm in offline environments

[CelestineSauvage]

I am currently maintaining an automated installation script for MiKTeX in an offline environment. My existing script, which worked with an older version (maybe 2/3 years old version), seems to be causing errors when launching the software after upgrading to the latest version.

Setup :
Windows server 2019. To support our offline infrastructure, we use a mirrored repository for packages in file dir.

Here are the commands I am currently using:

basic-miktex-25.12-x64.exe --auto-install=yes --unattended --shared --paper-size=A4 --user-data=U:\Miktex\Data --user-config=U:\Miktex\Config --user-install=U:\Miktex\Paquets

"C:\Program Files\MiKTeX\miktex\bin\x64\mpm.exe" --admin --set-repository=Y:\MiKTeX\localRepository

"C:\Program Files\MiKTeX\miktex\bin\x64\mpm.exe" --admin --update --repository=Y:\MiKTeX\localRepository

The issue:
Installation errors: The installer runs, but the software encounters errors upon launch with a pop-up message.
Could you please point me to any official documentation for these command-line options, or let me know if there have been breaking changes in the argument syntax for recent releases?

Thank you very much for your help.

[CelestineSauvage]

Hi, up !