Browsing the installation directories, I found the vc-integrity.xml in "C:\Program Files (x86)\VMware\Infrastructure\Update Manager\". Browsing through it, I found the following parameters:
<guestRebootTimeout>900</guestRebootTimeout>
<guestShutdownTimeoutMinutes>10</guestShutdownTimeoutMinutes>
Now, the first parameter seems to correspond with the time Windows is idling and waiting to be rebooted. The question is, what will changing this value to a lower value mean? If I change it to 120, will WUM wait max 120 seconds for the guest to be rebooted (and then fail if windows still waits 15 minutes before being rebooted), or will WUM make windows reboot after 120 seconds?