Can't delete duplicate mailboxes

Question

In Exchange Admin Center, I have a pair of duplicate mailboxes. The User has been deleted but the two mailboxes remain and there is no way to delete them and it won't let me change the email address of either mailbox and gives this email address: Error executing request. The operation couldn't be performed because 'e1e487dd-1627-44a3-8953-b0a89f77f359' matches multiple entries.

Answer 1

Dear Chrismon,

 

Good day!

Thank you for posting to Microsoft Community. We are glad to assist!

 

Based on your description, I understand that you are unable to delete duplicate mailboxes, would you mind offering below information:

• May I double confirm that you get same situation when you run the PowerShell command they mentioned in this article?"Multiple entries" error when a remote move migration fails - Exchange | Microsoft Learn   As a global admin, you can run this through Exchange online PowerShell. Ignore steps 1-3 if you already installed the Exchange Online PowerShell module and just connect (step 3). Run Windows PowerShell as an administrator and input the following. Ref: Connect-ExchangeOnline (ExchangePowerShell) | Microsoft Learn
  1. Set-ExecutionPolicy RemoteSigned
  2. Install-Module -Name ExchangeOnlineManagement
  3. Import-Module ExchangeOnlineManagement
  4. Connect-ExchangeOnline  #sign in with your admin account credentials.
  5. Get-Mailbox -Identity <conflicting email address> | fl Name, Alias, DistinguishedName, GUID
  6. New-MoveRequest -Identity <active mailbox GUID>
• May I know your current environment? Is It Exchange Hybrid, on-premises exchange (Exchange server) or pure cloud?

 

Looking forward to your response!

 

Best regards,

Inema |Community Moderator

I have an online exchange platform. Microsoft 365 suite

Answer 2

Dear Chrismon,

Good day!

Thank you for posting to Microsoft Community. We are glad to assist!

Based on your description, I understand that you are unable to delete duplicate mailboxes, would you mind offering below information:

• May I double confirm that you get same situation when you run the PowerShell command they mentioned in this article?"Multiple entries" error when a remote move migration fails - Exchange | Microsoft Learn As a global admin, you can run this through Exchange online PowerShell. Ignore steps 1-3 if you already installed the Exchange Online PowerShell module and just connect (step 3). Run Windows PowerShell as an administrator and input the following. Ref: Connect-ExchangeOnline (ExchangePowerShell) | Microsoft Learn
  1. Set-ExecutionPolicy RemoteSigned
  2. Install-Module -Name ExchangeOnlineManagement
  3. Import-Module ExchangeOnlineManagement
  4. Connect-ExchangeOnline  #sign in with your admin account credentials.
  5. Get-Mailbox -Identity <conflicting email address> | fl Name, Alias, DistinguishedName, GUID
  6. New-MoveRequest -Identity <active mailbox GUID>
• May I know your current environment? Is It Exchange Hybrid, on-premises exchange (Exchange server) or pure cloud?

Looking forward to your response!

Best regards,

Inema |Community Moderator