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Can't Run a Flow in a Windows Server 2016 VM with unnatended mode

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Posted on by AdminInfra

Hi all, How it's going?

I'm trying to Run a Flow that start in Cloud Flow and reach Desktop Flow, and this PC it's running Windows Server 2016 VM.

It Work's normally with attended mode, but unnatended isn't. The message error:

{

"error": {

"details": [

{

"code": "SessionExistsForTheUserWhenUnattended",

"target": "server",

"message": "There is a user session on the target machine. Cannot execute unattended desktop flow."

}

"code": "NoCandidateMachine",

"message": "No machine able to run the desktop flow has been found. Aborting execution. Error encountered when connecting to machines: There is a user session on the target machine. Cannot execute unattended desktop flow. (server)"

}

And obviously have some users logged because it's an application server,

there is a way to change that?

Thanks

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Power Automate Desktop

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Pstork1 69,599 Most Valuable Professional on at

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One of the main differences between attended and unattended is that the user used for the connection has to be logged in for an attended flow and they can't be logged in for an unattended flow. Is the user used in your connection logged out of the server when you try to run the flow?

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AdminInfra 51 on at

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Hi, @Pstork1 , Thanks for helping me,

The situation it's that server it's running in a VM, with Admin user logged, and other aplications running inside, and the user can't be logged out, because of that...

I think in a situation with another user only to run this system, do you think this will run it?

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Pstork1 69,599 Most Valuable Professional on at

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In that case I think you want to run the flow in attended fashion with the connection configured using the admin account that is logged in.

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AdminInfra 51 on at

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Yes it works like this way, but if i close the Remote Desktop Connection in Windows to the VM, doesn't work. That's is the problem, i'm allways with that VM open to work it...

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AdminInfra 51 on at

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I think my problem it's something like that

https://powerusers.microsoft.com/t5/Building-Flows/No-Unlocked-Active-Session-For-Attended/td-p/514254

Edit: I believe the issue lies within when exiting a RDP session and the User Account is essentially stuck in limbo from the remote session. I have created a batch file that essentially restores console session to the "local" user rather than the same user with RDP (hope that makes sense haha!). Once using that batch file to log out the machine, running the flow works successfully.

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AdminInfra 51 on at

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Searching on the same topic, i found this command:

%windir%\System32\tscon.exe RDP-Tcp#NNN /dest:console

and this command log off the user on the remote desktop correctly and i can run the flows in that way,

after that i can create a batch to make this automatically:

for /f "skip=1 tokens=3" %%s in ('query user %USERNAME%') do (
%windir%\System32\tscon.exe %%s /dest:console
)

for me, it's working right now, thanks.

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