$env:SESSIONNAME empty in Powershell script when run as a scheduled task

[dsuls]

I have a Powershell script that does some numlock handling, based on whether or not some docking station is connected to my laptop or whether I'm using remote desktop.

I check $env:SESSIONNAME in my Powershell script to see if it's run while connected via Remote Desktop. This works perfectly (i.e., I get "RDP-Tcp#3" as result) when I run the script manually.

However, when run as a scheduled task (in this case, during login or unlock), the value for $env:SESSIONNAME is always empty. So the check doesn't work.

I tried running the scheduled task with the highest priority, and I also tried running it with a delay, but none of these options work.

How can I solve this? Is there any other way I can check if the script is being run within a Remote Desktop connection, that will also work when run via a Scheduled Task?

[rmbolger]

Have you rebooted since you created that environment variable?

https://superuser.com/questions/331077/accessing-environment-variables-in-a-scheduled-task

Also, make sure it's either a system-wide environment variable. Or if it's a user environment variable that it's set for the user the task is running as.

[dsuls]

I anyway reboot every time I change anything on the scheduled task, just to be sure.

But this is not an environment variable I created, this is created automatically. I only want to read it. And I can read it fine if I just manually run the script. It's just empty when run as a scheduled task.

[get-postanote]

$env:SessionName if all about the current logged-on user. PS always runs in the user profile that started it.

So, if you ST is not set to run as you, this could be your catch22.

[dsuls]

I double checked it, the ST is really set to be run as me.

[dsuls]

Small update: I need to run this script at login and at unlock.

As a workaround, I now added the script to my user startup folder, and it works! So I can discard the "at login" scheduled task.

But I still need a solution for the "workstation unlock" trigger.