Removing X400 Addresses from Recipients

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If you Exchange environment has been through a number of upgrades you may find, with Exchange 2013, you want to clean up unneeded addresses.

The following PowerShell example can assist with this. The code below gets a list of Mailboxes that contain X400 addresses, then creates a new set of email addresses for each recipient, sans X400 address. The new set of email addresses is then applied to the mailbox.

$Recipients = Get-Mailbox -ResultSize Unlimited | Where {$_.EmailAddresses -like “X400:*”}
foreach ($Recipient in $Recipients)
{
[array]$AllEmailAddresses = $Recipient.EmailAddresses
[array]$NoX400Addresses = $Recipient.EmailAddresses | Where {$_ -notlike “X400:*”}
Set-Mailbox -Identity $Recipient.Identity -EmailAddresses $NoX400Addresses
}

You can alter the script to alter other recipient types, such as MailContacts, DistributionGroups and MailPublicFolders. Simply replace Get-Mailbox and Set-Mailbox with the appropriate command.

About The Author

Steve is a 5 times recipient of the MVP (Microsoft’s Most Valuable Professional) award from Microsoft, is a regular international conference speaker, podcast host, regular blogger, plus he is the author of a number of popular Exchange books. Steve is Head of Messaging and UC at top Office 365 partner Content and Code, responsible for their Exchange and Skype for Business offerings. Steve has worked on a vast number of Exchange and Office 365 projects across customers large and small, often with complex requirements and loves to share his expertise.

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3 thoughts on “Removing X400 Addresses from Recipients”

    1. Nagaraj

      HI Mujaffar,
      Keep two columns; emailID, X400 in SV file

      Import-Csv C:\users.csv | % {
      Set-Mailbox $_.emailID -EmailAddresses @{remove=$_.X400}
      }

      Please let me know if you need any further details.

      Reply

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