Review the below PowerShell script

[akashgowda]

For line 3 please take a look at a way at calling Import-csv for a list of device IDs so we don’t deploy to all, Script below is looking for a device and matching it against the owner info then writing the ExAttrib from the user account to the device ExAttrib in AAD.

Connect-MgGraph -Scopes “Directory.AccessAsUser.All”
Select-MgProfile Beta
##[array]$Devices = Get-MgDevice -All ### Need to change to list of Device ID from CSV for testing

ForEach ($Device in $Devices) {
If ($Device.PhysicalIds.count -gt 0) {
Foreach ($X in $Device.PhysicalIds) { If ($X.SubString(0,10) -eq “[USER-GID]”) { $UserGuid = $X } }
$UserId = $UserGuid.substring(11,36)
If ($UserId) { #We found a user identifier - try to resolve it against Azure AD
[array]$User = Get-MgUser -UserId $UserId -ErrorAction SilentlyContinue }
If ($User) { # Found a user in Azure AD
Write-Host (“Device {0} owned by {1}” -f $Device.DisplayName, $User.DisplayName)
$Attributes = @{
“extensionAttributes” = @{
“extensionAttribute13” = $User.extensionAttribute13

} | ConvertTo-Json
Update-MgDevice -DeviceId $Device.Id -BodyParameter $Attributes
}
Else { Write-Host (“Device {0} owned by unknown user {1}” -f $Device.DisplayName, $UserId ) }
} # End If Device PhysicalsId
} #End Foreach

[saidbrandon]

When inserting code, please use the “Insert Code” button </>. It makes it a lot easier to read.

Finding the device is dependent on what’s in your CSV and how it’s formatted. Here’s a generic idea

$Devices = Import-Csv -Path "C:\Path\File.csv"

$Devices | ForEach-Object {
    $Device = Get-MGDevice -DeviceId $_.DEVICEIDCOLUMNNAME -ErrorAction SilentlyContinue
    # OR
    $Device = Get-MGDevice -Filter "extensionAttributes/extensionAttribute1 eq 'BYOD-Device'"

    if ($null -ne $Device) {
        # DO STUFF
    }
}

I’d recommend using the Filter option if possible. The documentation has a number of samples on finding devices.

[martin9700]

Write-Host Kills Puppies

[saidbrandon]

As of PowerShell 5, the puppies are safe, whew!

Write-Host became (in essence) a wrapper for
Write-Information -InformationAction Continue in PSv5, presumably because:

    it enables suppressing or redirecting Write-Host messages, which was not previously possible (in PowerShell 4 or below, Write-Host bypassed PowerShell's streams and output directly to the host),

    while preserving backward compatibility in that the messages are output by default - unlike with Write-Information, whose default behavior is to be silent (because it respects preference variable $InformationPreference, whose default value is SilentlyContinue).

While Write-Host is therefore now (PSv5+) a bit of a misnomer — it doesn't necessarily write to the host anymore — it still has one distinct advantage over Write-Information (as you state): it can produce colored output with -ForegroundColor and -BackgroundColor

https://stackoverflow.com/questions/38523369/write-host-vs-write-information-in-powershell-5

I will also add, if you’re bent on writing colored output to the screen, this is the simplest way

Write-Information With Colours

[akashgowda]

Hi thank you for the help and can you please modify the same script I have shared it will help me a lot

[saidbrandon]

I posted a sample skeleton that you can try. There are a lot of unknowns with your code and your question. We’re not mind readers or a script on demand service. Please try what’s above and let us know if you have further questions or need additional help.