You work as the enterprise exchange administrator at Xxx .The Xxx network is running in a Microsoft Exchange Server 2010 environment.How can you find out about the mailboxes that exceeds 2 GB in size?()
A、A.You must use the Get-MailboxStatistics cmdlet.
B、B.You must use the Test-Mailflow cmdlet.
C、C.You must use the Get-StoreUsageStatistics.
D、D.You must use the Test-ServiceHealth cmdlet.