Unable to unlock remotely Windows with unattended access I was able to to use remote desktop password instead of PIN. I had to configure the " CloudBerry Remote Assistant Service" in "services.msc" , in the tab "Log On" to use "This account" (with specified account name and password.
Unfortunately, the password doesn't unlock the PC with the error message:
Connection to 018 xxx xxx
Remote Assistant start failed on remote computer, application start failed.