Different UPN to username

[ITGURU]

having run local exchange for years and having the email address format different to the username, now that I have moved fully to 365. how can i automate the local UPN to change to the same format forename.surname@ as all other users when it syncs to 365 via azure AD connect?

[kevin_lane]

Use something like salamander this takes care of everything

[snagrat]

Assuming the Email Address field is set, and you want the email address to become the UPN, then a simply powershell script will do this.

 

I have one somewhere but ChatGPT came up with this

 

# Import Active Directory module

Import-Module ActiveDirectory

 

# Get all users from Active Directory

$users = Get-ADUser -Filter *

 

# Loop through each user and set UPN to match email attribute

foreach ($user in $users) {

$email = $user.EmailAddress

$currentUPN = $user.UserPrincipalName

$domain = "yourdomain.com" # Change this to your domain

 

if ($email -ne $null) {

$newUPN = $email

if ($currentUPN -ne $newUPN) {

Set-ADUser -Identity $user -UserPrincipalName $newUPN -Server $env:USERDNSDOMAIN

Write-Host "Changed UPN for $($user.Name) to $newUPN"

} else {

Write-Host "UPN for $($user.Name) is already set to $newUPN"

}

}

else {

Write-Host "No email found for $($user.Name)"

}

}

[3s-gtech]

ADModify.NET may be able to do it for you, ancient as it is. Still does a lot of bulk work for me.