You have an Exchange Server 2010 server named Server1. Server1 has a single mailbox database named DB1 that contains 300 mailboxes. You need to ensure that a warning message is issued when a mailbox exceeds 2 GB. The solution must use the minimum amount of administrative effort. What should you do?
A. From the properties of DB1, configure options on the Limits tab.
B. From the properties of each mailbox, modify the storage quotas.
C. From the properties of Server1, configure options on the Messaging Records Management tab.
D. From Managed Default Folders, modify the properties of the Entire Mailbox managed folder.