I.E. I install Firefox:

In the Post-Deployment I need a batch file to be executed with following content:

xcopy "\\my-share\DCSWRepository\Firefox\Tools-Configs\Proxy\local-settings.js" "C:\Program Files (x86)\Mozilla Firefox\defaults\pref\" /C /H /Y /Z

This command is not executed/the file is not copied to the client machine.

When I open a CMD as administrator and then run the batchfile, there is no problem, the files are copied immediately!

I believe this has to be connected to my deployment running "as SYSTEM user":

I already tried to change the command to full path: "C:\Windows\System32\xcopy.exe ......."

But this did not help.

The file from my networkshare is available and can be accessed by "everyone".

It has worked in the past, I did not change anything inside the batchfile..

What can I do to troubleshoot or is there a Bug?

I am running  Build No:92080