Disable SMS Syncing on Outlook

On the phone, go into the email app

1. Push the menu soft key.
2. Select "settings".
3. Select your email address. DO NOT tap "General preferences", tap your actual email address.
4. Scroll to the bottom and uncheck Sync SMS

OR:

1. Go to Settings
2. Select "Microsof Exchange ActiveSync" in Accounts group
3. Select the "Settings" under Common settings group
4. Select your email address. Do NOT tap "General preferences", tap your actual email address.
5. Scroll down to the last choice: "Sync SMS", under Server settings group and uncheck it