Ondrej Žilinec – IT Blog

When you install Exchange in environment you want to allow users to log into mails using their e-mail address. If your domain name is different from your e-mail domain, you have to add UPN suffix first. More abour it HERE. Then you need to change User Principal Name into Primary SMTP Address. I wrote little script to do so:

Get-Mailbox |
  ForEach-Object{
   Write-Host “For: ” + $_.SamAccountName
   Write-Host ”   – change UPN from: ” + $_.UserPrincipalName + ” to: ” + $_.PrimarySmtpAddress
   Set-ADUser -Identity $_.DistinguishedName -UserPrincipalName $_.PrimarySmtpAddress
 }

Have a nice day,

Sometimes when you install Exchange, you want to allow users to use their e-mail addresses as a login name. Most of the time UPN suffixes are not usefull. For example you have internal name for domain “company.corp”, but your e-mail addresses are “username@company.com“. You want to give an option for users to log into OWA using “username@company.com” instead of “company.corp\username”.

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