RentHQ has the ability to be run in a higher security mode. When run in this mode, RentHQ has the ability to do extra tasks, such as the ability to use Outlook to send emails.
To enable the higher security mode, right-click anywhere in RentHQ, and choose to Install RentHQ on your computer. After installed, a new icon will be added to your desktop or start menu or both. You need to run RentHQ from this icon, not in the web browser, to enable the higher security settings.