This page lists server-based solutions that connect directly to Microsoft Exchange that don't fit in the other mobile access categories:
For personal solutions that work directly with Outlook on the desktop, mostly non-Exchange users can get two-way mobile access with the tools and services listed at Tools for Mobile Access to Microsoft Outlook Data.
Are your employees working late, and you need to restrict that due to company or governmental policies? ControlPlus TimeLock enforces time-based access rules to Exchange Server, enforcing corporate policies around access to company resources outside business hours.
Automatically sends your Outlook reminders to your mobile phone when you are not at your desk. When any of your Outlook reminders pop up, Reminder Forwarding will wait for you to click Snooze or Dismiss, or open the item. If you do not click on the reminder within 30 seconds your reminder will instantly be sent to your mobile phone.