AzPosture

0.1.0-preview2

checks/entra/stale-devices.ps1

                                # Registered/joined devices with no sign-in activity in 90+ days.

$cut = (Get-Date).AddDays(-90)

$devices = Get-GraphAll 'https://graph.microsoft.com/v1.0/devices?$select=displayName,approximateLastSignInDateTime,operatingSystem,trustType'

$items = @()

foreach ($d in @($devices)) {

    $last = To-Date $d.approximateLastSignInDateTime

    if ($last -and $last -lt $cut) {

        $items += [pscustomobject]@{ Title = $d.displayName; Detail = "Last activity $($last.ToString('yyyy-MM-dd')) ($($d.operatingSystem), $($d.trustType))" }

    }

}

[pscustomobject]@{

    Name = 'Stale devices (90+ days)'

    Severity = 'low'

    Evidence = "$($items.Count) device(s) with no sign-in activity in 90+ days"

    Fix = 'Review and remove devices with no recent activity; stale devices still hold tokens and widen the attack surface.'

    Items = $items

}