Mailbox with DisplayName "Microsoft Exchange"

Good morning,

monitoring a customer Exchange infrastructure I run a cmdlet similar to the following one:

Get-MailboxDatabase | Get-MailboxStatistics | Where { $_.Displayname -like 'Microsoft Exchange' } | ft displayname,mailboxguid,database,disconnectreason -AutoSize

Receiving the answer:

DisplayName            MailboxGuid      Database    DisconnectReason
-----------                   -----------           --------         ----------------
Microsoft Exchange  GUID1                DB1
Microsoft Exchange  GUID2                DB1

I tried to find out to which account do they belongs (with cmdlets get-mailbox, get-mailbox -monitoring and get-mailbox -arbitration) but didn't found any answer.

Moreover I didn't found any hints about their functionality (what they do).

Usually the presence of two mailbox with the same DisplayName register some error events but Exchange infrastructure doesn't show significant related issues so I can leave those mailbox untouched.

Can someone help me to clear this situation and eventually identify the inactive mailbox to safely remove it?

Rocco Daniele Ciaravolo