MgGraph – Device

# MgGraph - Lookup a device by name
$deviceName = 'ComputerName'
Get-MgDeviceManagementManagedDevice -Filter "deviceName eq '$deviceName'"

# MgGraph - Lookup all details of a device
$deviceName = 'ComputerName'
Get-MgDeviceManagementManagedDevice -Filter "deviceName eq '$deviceName'" | Format-List

# MgGraph - Display all Managed Devices
Get-MgDeviceManagementManagedDevice -All 

# MgGraph - Count the numbers of Managed Device
$devices = Get-MgDeviceManagementManagedDevice -All
$devices.Count