PS HarriJaakkonen :~/Blog/Posts> cat ./change-upn-suffix-for-all-users-in.html

Change upn-suffix for all the users in certain OU

11/08/2014 · 1 min read · Post #75

Office 365 Powershell

Get-ADUser -Filter {UserPrincipalName -like "*@domain.local"} -SearchBase "OU=whateverisright,DC=contoso,DC=com" |

ForEach-Object {

$UPN = $_.UserPrincipalName.Replace("domain.local","newdomain.local")

Set-ADUser $_ -UserPrincipalName $UPN

}