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I am trying to run a PowerShell script to change all UPNs in a specific OU to lowercase, but I am not having any success. Based on some previous posts and using the same command I use to change other attributes successfully, I am trying the following:

Get-ADUser -Filter * -SearchBase "OU=[REDACTED]" 
    | Set-ADUser -replace @{userPrincipalName=userPrincipalName.ToLower}

But when I run this I am getting an error

'userPrincipalName.ToLower' is not recognized

I have also tried adding () to the end of ToLower, but with the same result.

Any suggestions would be greatly appreciated. Thank you for your time.

I am trying to run a PowerShell script to change all UPNs in a specific OU to lowercase, but I am not having any success. Based on some previous posts and using the same command I use to change other attributes successfully, I am trying the following:

Get-ADUser -Filter * -SearchBase "OU=[REDACTED]" 
    | Set-ADUser -replace @{userPrincipalName=userPrincipalName.ToLower}

But when I run this I am getting an error

'userPrincipalName.ToLower' is not recognized

I have also tried adding () to the end of ToLower, but with the same result.

Any suggestions would be greatly appreciated. Thank you for your time.

• powershell
• active-directory

Share Improve this question Follow edited Nov 20, 2024 at 20:33 marc_s 756k184184 gold badges1.4k1.4k silver badges1.5k1.5k bronze badges asked Nov 20, 2024 at 20:17 AA27CXPAA27CXP 1355 bronze badges

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1 Answer 1

Sorted by: Reset to default 1

You're missing a loop in your code to get the pipped user's UserPrincipalName, add ForEach-Object and reference it via $_.UserPrincipalName, then you can .ToLower() it:

Get-ADUser -Filter * -SearchBase 'OU=[REDACTED]' | ForEach-Object {
    Set-ADUser -Identity $_ -UserPrincipalName $_.UserPrincipalName.ToLower()
}

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