I wanted to change the email address of a user in exchange server by powershell command which also needs to be updated on active directory

Question

I wanted to change the email address of a user in exchange server by powershell command which also needs to be updated on active directory

Answer 1

If you are syncing from on-prem to Exchange Online, change on-prem powershell:

https://learn.microsoft.com/en-us/powershell/module/exchange/set-mailbox?view=exchange-ps

set-mailbox <user> -PrimarySMTPAddress user@contoso.com

https://learn.microsoft.com/en-us/exchange/recipients/user-mailboxes/email-addresses?view=exchserver-2019#use-the-exchange-management-shell-to-add-an-email-address

Answer 2

Hi @ Athique Nihal ， Just wondering if there is another proxy address for this mailbox. If not ,you can refer to the following command to change directly:

Set-Mailbox user2 -EmailAddressPolicyEnabled $False
Set-Mailbox user2 -EmailAddresses $list  

If the mailbox has other proxy addresses and needs to be retained, you cloud refer to the following script to modify the primary email address:

Set-Mailbox user2 -EmailAddressPolicyEnabled $False

   $mb = Get-Mailbox  user2
   $newPrimaryMail = "user3@domain.com"
   $list = New-Object System.Collections.ArrayList
 
   foreach($address in $mb.EmailAddresses) {    

       if ($address.IsPrimaryAddress -eq "true") { 
            $address = "SMTP:" + $newPrimaryMail 
       } 
       else {
            $address = $address.ProxyAddressString 
       }


       $list.Add($address) 
   }

  Set-Mailbox user2 -EmailAddresses $list  

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