I read SMS text massage information at the http://help.outlook.com/en-us/140/dd251212.aspx as below.
"Short Messaging Service (SMS), also known as text messaging, is a way of communicating using mobile phones. You can set up your account to send text messages to your mobile phone when you miss a call, receive a voice mail message, or receive a meeting request. This feature is currently available in the United States and China. More countries will be supported in the future. "
I'm not in the USA and China so I cannot use it now.
Please let me know when we will be able to use this feature if you know.