Alert me when a device comes on line
Ok I am aware we can get alerts when a device is off line. I however have a number of remote users and they can be offline for days/weeks. I want to get a alert when the device is online so as I can run some background custom once off scripts. Please consider this as I would also use it for retired devices that SHOULD not be on the network prior to recycling which has happened.
Thanks again.
Leo (MySite)

Nice! The feature you requested is being reviewed by our product team. We’ll keep an eye on the number of votes, and let you know if a decision is reached to implement. Thank you for being a partner in our process!
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Chad Scott commented
Another use case is for metered instances like EC2. We want to detect and monitor their usage and have an alert fire if they are powered on for longer than a normal period of time so we don't have unexpected costs.
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Phill Barnes commented
To expand on this, we would like it to notify us when a monitored device comes back online after its gone offline. for example, we are notified when a monitored device (eg server) goes offline but never informed when it comes back online, we have to manually check. We would like a quick notification email to be triggered when online again on a monitored device