You have an Exchange organization. All servers in the organization have Exchange Server
2010 Service Pack 1 (SP1) installed.
You need to prevent users on the network from enabling text message notifications to their
Windows mobile devices.
What should you configure?

A.
a Group Policy administrative template

B.
an Exchange ActiveSync mailbox policy

C.
an Outlook Web App Mailbox policy

D.
an RMS template

Explanation:
For text message notifications (letting you know when important mails have been received
from certain users etc)., you should set an OWA mailbox policy.
Reference showing the client side (what users see in OWA):
http://technet.microsoft.com/en-us/library/ee633486.aspx
You can also use EMS to disable text messages completely (not just text message
notifications) using the
Exchange ActiveSync Mailbox Policy, but this is not what they are asking for here:
Set-ActiveSyncMailboxPolicy -Identity:default -AllowTextMessaging:$false
This is where you turn text message notifications off in EMC: