You have an Exchange Server 2010 organization.

You need to ensure that users in the organization are notified before they send email messages to external recipients.

Which cmdlet should you run?

A.
Set-Mailbox.

B.
Set-OrganizationConfig.

C.
Set-TransportAgent.

D.
Set-TransportConfig.

Explanation:
You would run the following command:

Set-OrganizationConfig -MailTipsExternalRecipientsTipsEnabled $true.

Reference:

http://technet.microsoft.com/en-us/library/dd638109