Change all users' UPN using powershell

Hello All,

I need to change UPN suffix for all of my users.  I know that I can change one user's UPN using powershell and the Set-mailbox command.  I'm trying to figure out the syntax to do all users.  I wish there was a parameter for just the SUFFIX of the UPN, but I haven't found anything on that.  So, to change all users, I exported them to a csv file and corrected the UPN in that file.  I was going to run the following command to change the UPN, but I'm getting complaints about the the syntax.  

Import-csv c:\users.csv | Set-Mailbox -Identity $_.identity -UserPrincipalName $_.upn

Can someone give me some guidance?  Thanks so much.
FlofromTO
martinichickAsked:
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BSonPoshCommented:
With the Quest tools you can do this

dl from here www.question.com/powershell


$users = Get-QADuser -size 0
foreach($user in $users)
{
   $UPN = "$($user.sAMAccountName)@new.upn"
   $user | Set-QADUser -UserPrincipalName $UPN
}

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BSonPoshCommented:
Note... use this command to add the snapin after it is downloaded and installed
add-pssnapin Quest.ActiveRoles.ADManagement
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ntr2defCommented:
how would I go about setting the upn using a csv file but using the DN rather than the samaccountname as we have multiple domains
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OutdoorResearchCommented:
Link is broken.
0
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