Orphaned Public Folder mailboxes on Exchange 2016

Hi ullerdk,

thanks for your update.

you can still use (or eve try to use) the ExchangeGUID to remove orphaned Public Folder mailboxes with PowerShell, even if they cannot be found by the Get-Mailbox command. To do this, you can use the following PowerShell cmdlet:

Remove-Mailbox -Identity <ExchangeGUID> -Force

The -Force parameter is required because the orphaned mailboxes are not in a valid state.

You can find the ExchangeGUID by running the following PowerShell cmdlet:

Get-MailboxStatistics -Database <DatabaseName> | where {$_.DisplayName -like "Mailbox*"} | FT DisplayName,MailboxGuid

This cmdlet will return a list of all mailboxes in the specified database, including their name and ExchangeGUID.

Once you have the ExchangeGUID of the orphaned mailbox, you can run the Remove-Mailbox cmdlet to remove the mailbox.

For example, to remove the mailbox with the ExchangeGUID of 12345678-90AB-CDEF-0123-456789ABCDEF, you would run the following PowerShell cmdlet:

Remove-Mailbox -Identity 12345678-90AB-CDEF-0123-456789ABCDEF -Force