Hi,
Thanks for your reply.
==>Do you know what makes a device go stale - is it simple lack of use? And if so, why doesn't it come back online after it is turned on again?
The setting is defined in the Devices > Compliance Policies > Compliance policy settings > Compliance status validity period (days), it will apply to all managed devices, and are evaluated as "Built -in Device Compliance Policy". By default, the period is set to 30 days. You can configure a period from 1 to 120 days.
You can view details about device compliance to the validity period setting. Sign in to Microsoft Endpoint Manager admin center and go to Devices > Monitor > Setting compliance. This setting has a name of Is active in the Setting column. I think it's based on the last check-in date of the device.
Refer to:Compliance policy settings
Thanks for your time.
Best regards,
Simon
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