Article ID: 2795291 - View products that this article applies to.
When you use the Get-MailboxStatistics Windows PowerShell cmdlet to get information about a mailbox in Exchange Server 2013 or Exchange Online in Office 365, the ObjectClass property unexpectedly returns a value of Unknown.
For example, when you run the Get-MailboxStatistics admin | FL *object* command, you receive the following output:
In earlier versions of Exchange Server and in Exchange Online in Office 365, the ObjectClass property returns the correct value. For example, this property returns Mailbox for user mailboxes and Mailbox, Disabled for equipment and room mailboxes.
ObjectClass : Unknown ObjectState: Unchanged
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This issue will be fixed in a future release.
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Article ID: 2795291 - Last Review: October 29, 2014 - Revision: 6.0