Exit not Exiting in invoke-command in remote ps session - powershell

Question

I have a Function invokes a command that starts a new ps session on a remote server. The invoke command has an Exit clause however this is not exiting?
Function CreateID{
Invoke-Command -Session $Script:sesh -ScriptBlock{
Set-Location c:\
Import-Module ActiveDirectory
Try
{
If (Get-ADGroupMember "$Using:IDGroup" | Where-Object Name -match
"$Using:Computer")
{
Write-Host "Already in $using:IDGroup Exiting Script"
Disconnect-PSSession -Session $Script:sesh
Exit-PSSession
Exit
}
}
Catch
{ }
Write-Host "Did not Exit"
}
}
The Get-AD command works fine so where it should not display "did not exit" it does - how can i exit from a scriptblock in a remote ps session?
I am trying the disconnect session and Exit-pssession to see if they would do the same as simply exit but none of those are working.
I have also tried Break and no luck.

Answer 1

Ok so i figured this out - the ps session and invoke-command are red herrings. The basis of this is that you cannot Exit a Try/Catch statement.
i had to do this to get it to work - now it Exits. I just cannot use a Try/ Catch - if anyone knows how to exit a Try/Catch let me know!
#Try
#{
If (Get-ADGroupMember "$Using:IDGroup" | Where-Object Name -match
"$Using:Computer")
{
Write-Host "Already in $using:IDGroup Exiting Script"
Disconnect-PSSession -Session $Script:sesh
Exit-PSSession
Exit
}
#}
#Catch
#{ }

Answer 2

I don't know if this works for PSSession or not, and I don't have an environment to test it, but you can use this to exit powershell within a try catch
[Environment]::Exit(0)

Answer 3

Try/Catch should work in an invoke-command.
I don't usually invoke-commands to sessions, rather I use -ComputerName.
This worked fine for me:
invoke-command -ComputerName "MyDomainController" -ScriptBlock {
try { get-aduser "ValidUser" } catch { "doh!" }
}
I just tried this as well and it also worked:
$sess1 = New-PSSession -ComputerName MyDomainController
invoke-command -Session $sess1 -ScriptBlock { try { get-aduser "ValidUser" } catch { "doh!" } }
If I change either of those "ValidUser" values to invalid users I see the "doh!" as well.
Perhaps it's because you're trying to end the session from within the session.
You should deal with the output of the invoke-command or the function and then handle the session based on that.
Like using my lame example...
$sess1 = New-PSSession -ComputerName MyDomainController
$DoStuff = invoke-command -Session $sess1 -ScriptBlock { try { get-aduser "ValidUser" } catch { "doh!" } }
If ($DoStuff -eq "doh!") { Remove-PSSession $sess1 } else { $DoStuff }