Why does a managed device show offline on the Skie dashboard?
Offline on the dashboard means Skie has not recently received a report from the device. Common causes are no Wi-Fi or data, a flat battery, the device being switched off, or the device being in offline mode on purpose. It does not mean the rules have stopped working, because they are cached on the device.
The dashboard works from reports, so offline is a statement about communication, not about protection. A tablet can be fully enforcing its rules and still show offline because it has no route to the server.
Work through the likely reasons in order. Is it charged and switched on? Is the Wi-Fi in range, and has its password or the network setup changed? On a device with mobile data, has the plan run out? Skie does not include a mobile plan or SIM, and Wi-Fi-only tablets work for most features, so connectivity depends on your own network. Some networks also block the encrypted DNS port. In that case the device falls back to the network's DNS and the dashboard flags it.
Then consider whether the device is in offline mode, a planned state with its own allowed apps and an organisation maximum. It shows as offline by design, and it ends automatically when the network returns.
If none of that fits, look at the thresholds. Due, Overdue, Offline unusual and Breach are editable, so what the dashboard calls offline may simply be a threshold set tighter than the device's normal pattern. Compare it with similar devices.
Once the device is connected or the screen is turned on, it syncs on its own. There is nothing to restart. You can also press sync on the device page to ask for a fresh report.
Practical tip: keep a short check list on the staff room wall: charge, Wi-Fi, time zone, then sync.