Before you can use your ChromeOS device, you need to set up ChromeOS kiosk mode from the Google Admin console.

Indeed, each ChromeOS device is linked to your Google Admin console in order to remotely manage it.

You need to create an OU dedicated to the digital signage. Every device in this OU will be set in Kiosk mode and will automatically launch the Comeen Play application when the device is booted.

In your Google Admin console, go to Devices > Chrome > App and Extensions > Kiosk.

Select the OU "Digital signage" on the left panel:

Click on the "+" button at the bottom right

Select "Add by URL"

In the URL field add: https://display.dynamicscreen.xyz/golem/?model=ChromeOS-PWA

Click on Agree

Then set this application to automatic launch mode:

And click on Save (top right corner):

Then click on Add Extension and Add from a custom URL

Click again on From a custom URL:

In the Extension ID field paste: jjoocijdfkfjdlkodeoicalhjnbbgieo and in the URL field paste: https://devices.play.comeen.com/chromeos/update.xml

Click on Save (top right corner):

ChromeOS devices enrolled in this OU will now launch the Comeen Play application in kiosk mode!

Now you need to enroll a ChromeOS device to your domain, follow this documentation.