Starting Qt Installer or MaintenanceTool graphically from mounted network drive results in the following pop-up:
"It is not possible to install from network location. Please copy the installer to a local drive"
But using the installation commands via CLI (specifying network drive as install target with -t) there are no complaints and all of the Installer/MT operations just work without any errors. Maybe this is unintentional?
Test environment: Windows on ARM, Qt Installer version 4.10