Storage Expiry is enabled.
How can messages from a single mailbox archive be prevented from deletion?

A.
clear the “Delete expired items from this archive automatically” check box in the archive properties

B.
use the Tools > Disable Mailboxes option

C.
mark the “Lock this category” check box in the Retention Category properties and restart the storage server

D.
create and apply an EVPM initialization file with “NONDeletable=True” against the mailbox