@Echo off
set STEAM_CMD_LOCATION="C:\tools\SteamCMD"
set STEAM_USERNAME="xxx"
set STEAM_PASSWORD="xxx"

cd "%STEAM_CMD_LOCATION%"
start "" steamcmd.exe +login "%STEAM_USERNAME%" "+force_install_dir c:\Eldo1" %~dp0 +app_update 223350 validate +app_update 223350 validate +quit
cd c:\temp\Eldo1

I have a batch file to run as part of a backup/install/restore script. And even with 2x validate it doesn't download the serverDZ.cfg. It doesn't do that for weeks already and I cannot remember that I ever downloaded one while install via steamCMD. Last time I run the script was today and since I didn't had to overwrite the serverDZ.cfg it tells me that there was no serverDZ.cfg provided via the installation.

Hello Micha.
The only time the serverdz.cfg should download is either if you are downloading the server for a first time or if you delete it manually and then update the server. This is to prevent the cfg from overwriting itself.
Regards,
Geez

I manually remove the server files with each patch. I have a backup script that copies all files modified by us, be and bec, then deletes the installation folder. Then a installation and a restore script runs and copies back the modified files that we earlier write to the backup. To steamCMD there is a non existing folder on drive c: hence I would expect the serverDZ.cfg being downloaded. It ofc would be overwritten by our restore script since we copied that during the backup as well.
But no serverDZ.cfg is downloaded this way.
Let me see how I can hide credentials in a video and I make you a video.