When I start psexec from commandline to destionation Computer and run the same commandline from the netshare, it works fine. So the problem only exists, when I deploy from Batchpatch.
The way that BatchPatch ‘deployment’ works is to first copy the setup file(s) to the target computer. Then BP executes the installer locally on the target computer. This is by design, so it’s expected behavior to see it execute from the local drive and not directly from the network share.