That is how you forward an e-mail as Text Message to a mobile phone.
Right-click the concerning e-mail and choose Forward as Text Message .
Customize the Text Message
Outlook opens the Text Message Editor containing the text of the e-Mail. The content can be customized the way you like.
Choose recipient
Choose one or more recipients. You can also make use of
Distribution Lists when forwarding an e-mail as a Text Message.
Send
A mouse click on the button [Send] will send the text message.
Forward any Outlook Objects
Not only e-mails can be forwarded as Text Message
Most Outlook Objects can be forwarded by a right click on them.
Forward RSS
RSS Feeds you have subscribed for can also be forwarded easily as Text Message.
Forward Appointments
Even Elements from your Outlook Calendar - Appointments, Conferences and Series - can be forwarded.
Forward Contacts
Forward Contact Information from your Outlook Addressbook. Every information about a contact will be added to the Text Message.
Forward Tasks
Tasks from the Microsoft Outlook 2007 To-Do List can also be comfortably forwarded as text message.

More Outlook Mobile Services usage instructions:
Microsoft resources for the Outlook Mobile Service: