Email Address policy

Question

So, I would greatly appreciate if anyone could help me find out what new email address has been added to list mailboxes due to an email address policy.

We had a default policy that was applied to most mailboxes and we created a "Test" Email Address policy with Primary SMTP address which mistakenly was applied to everyone(Due to its priority being higher). We have since deleted the policy but now every mailbox now has this added smtp address.

Is there a way for me to see what mailboxes didn't have this newly added smtp address before?

Thanks

Answer 1

@Safs-3080

Try to apply another email address policy on all mailboxes to change the primary smtp address fist(Because, we cannot remove a primary smtp address directly), then we can use script below to delete them:

$Mailboxes = Get-Mailbox | where {$_.EmailAddresses -like "*domain.com*"}  
  
foreach($Mailbox in $Mailboxes){    
      
    $temp = $Mailbox.Name  
    $temp2 = ((Get-Mailbox $temp).EmailAddresses -like "*@domain.com") -replace "\w*\:"  
  
    Set-Mailbox $temp -EmailAddresses @{remove=$temp2}  
}  

Change those two places before running:

1. Don't remove "*" from this script
2. The fist place don't have "@"

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