If you join devices to Azure AD, then you can see that each device has an owner. The owner is the user who joined the device to the Azure AD which is sometimes the account of the administrator. That’s why one probably wants to change the owner which is unfortunately not possible via the Azure portal. But, as usual, you can easily do it via PowerShell.

The main commands you need are:

Get-AzureADDevice   # returns all device
Get-AzureADUser     # returns all users
 
# add new device owner
Add-AzureADDeviceRegisteredOwner -ObjectId [DeviceObjectId] -RefObjectId [NewOwnerObjectId]
#remove previous device owner
Remove-AzureADDeviceRegisteredOwner -ObjectId [DeviceObjectId] -OwnerId [PreviousOwnerObjectId]

I created a simple script which has device name and new owner as input and simply does the job:

$deviceName = 'myDeviceName'   # configure device name
$newOwner = '[email protected]' # login name of the new user
 
Connect-AzureAD
 
# Get-AzureADDevice # if you want to list all devices
# Get-AzureADUser   # if you want to list all users
 
$device = Get-AzureADDevice | where { $_.DisplayName -eq $deviceName }
$aduser = Get-AzureADUser | where { $_.UserPrincipalName -eq $newOwner }
$oldowner = (Get-AzureADDeviceRegisteredOwner -ObjectId $device.ObjectId).ObjectId
 
"Change owner of device " + $device.DisplayName + " to " + $aduser.DisplayName
Add-AzureADDeviceRegisteredOwner -ObjectId $device.ObjectId -RefObjectId $aduser.ObjectId # add the new owner
Remove-AzureADDeviceRegisteredOwner -ObjectId $device.ObjectId -OwnerId $oldowner         # remove the previous owner
Get-AzureADDeviceRegisteredOwner -ObjectId $device.ObjectId                               # see the result

It’s important to mention that this does not work for the associate user in the Intune portal. This is a known issue and you can vote for it here: https://microsoftintune.uservoice.com/forums/291681-ideas/suggestions/31356574-change-registereed-owner-for-corporate-owned-devic

Additional Information

Azure AD Device Powershell Commands: https://docs.microsoft.com/en-us/powershell/module/azuread/?view=azureadps-2.0#devices