You have an Exchange Server 2013 organization named adatum.com. The organization contains two
servers named EX1 and EX2 that are configured as shown in the table.
Both servers are members of a database availability group (DAG). EX1 has the active copy of a
database named Database1.
Several users who have mailboxes in Database1 discover that all of their outbound email messages
remain in their Drafts folder when they use Outlook Web App.
You need to ensure that the email messages are delivered.
What should you do?
A.
On EX2, retry the message queues.
B.
On EX1, start the Microsoft Exchange Mailbox Transport Submission service.
C.
On EX2, start the Microsoft Exchange Mailbox Transport Submission service.
D.
On EX1, retry the message queues.
Microsoft Exchange Mailbox Transport Submission service — Handles outbound mail items. After receiving mail items for submission, the service ensures messages are converted from MAPI to MIME and then passes them along to the Transport service. The Transport service then routes the mail items for delivery.
When a user sends a new message, the client first stores the message in a folder (Sent Items for users running Microsoft Outlook in cached mode, Outbox for users running Outlook in online mode, or the Drafts folder for Outlook Web App). Then Mailbox Transport Submission service makes an RPC connection to the store and fetches the message from that folder. Then, it uses SMTP to send the message to the Transport service, either on the same server or on another