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From the Admin section select the System Monitoring option form from the menu
on the left hand side of the screen.
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If any of the Frontdoor services are showing Down then you can follow the next section on (Restarting Frontdoor) to restarting the Frontdoor.
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When you have identified the Frontdoor service in IIS you will need to open a web browser to that service providing the port and adding "/hangfire" to the end of the URL e.g. "http://localhost:60604040/hangfire"
A quick way to navigate to the address through IIS is to click the "Browse Website" button on the right hand
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