The ability to have SMS messages sent to a mailbox is an Exchange 2010 feature that can be enabled on some Android devices. This allows incoming SMS text messages to sync with OWA, as well as Outlook and other mail clients. Outgoing SMS messages are not synchronized using this feature with a hosted exchange mailbox.
SMS Sync may show up as an option during configuration of the account on the device. If available but not active, the feature can be turned off or on by doing the following:
1. From the home screen tap the menu key.
2. Tap Settings.
3. Scroll down to the Accounts section and select the Exchange account.
4. Tap Settings.
5. On the next screen, scroll down and look for the Sync SMS option. Enable or disable, depending on user preference.