Adding new SMTP mail address and set primary SMTP and Change User ID

Question

Dear,

One of our clients wants to change the domain test@jaswant .net to test@jaswant .com.

The old domain will be receiving mail (abc.net) till one month.

There are 250 mailboxes we need to change their primary email domain to a new domain.

Here is I test PowerShell for single user.

Adding new SMTP mail address and set Primary

Set-Mailbox "Test One" -EmailAddresses "SMTP:test@jaswant .com","test@jaswant .net"

Change User ID

Set-MsolUserPrincipalName -UserPrincipalName test@jaswant .net -NewUserPrincipalName test@jaswant .com

Please help PowerShell using CSV to add new SMTP address and set the primary email address and change User ID for multiple account (250 Mailboxes).

Answer 1

You can do this all with set-mailbox and the Exchange Powershell:

Create a csv with two columns and populate the values for :

UserPrincipalName
(Current UPN)

PrimarySMTPAddress
(New UPN and Primary SMTP)

then with Exchange online powershell:

$mailboxes = import-csv Mailboxes.csv
$mailboxes |% {Get-mailbox -UserPrincipalName  $._UserPrincipalName| Set-mailbox -UserPrincipalName $._PrimarySMTPAddress -PrimarySMTPAddress $._PrimarySMTPAddress}

Test with just a few first!!!!!

Then if it looks good, run against the entire list

Answer 2

Thanks AndyDavid, I'm testing on it.

Answer 3

Hi Andy,

I have already added the alias with the new domain and want to switch the alias to primary and primary to alias, is there any script for that?

Thanks