You have an Exchange Server 2010 Service Pack 1 organization that contains 20 mailbox
databases.
You configure each database to retain all deleted items for 30 days.
You need to ensure that all items that pass the retention period are permanently deleted
daily between 02:00 and 06:00.
Which cmdlet should you use?

A.
Set-MailboxDatabase

B.
Set-MailboxServer

C.
Set-OrganizationConfig

D.
Set-RetentionPolicy