Duplicate Provider Authority Error
This error will only occur if you have attempted to install both TouchDown for Smartphones and TouchDown 4 Not So Smartphones versions of TouchDown on your device. You only need one version, so the other copy will need to be uninstalled. For a newer device like a Droid or a Nexus (anything running Android 2.0 or higher), you will need the program marked “Touchdown for Smartphones.” For a device running a version of Android previous to 2.0, you will need the program marked “Touchdown 4 Not So Smart Phones.”
You can check which copy you currently have installed by going into Google Play (Market) on your device, pressing the menu key, selecting My Apps, and then selecting the TouchDown listing that says Installed. Once it brings up more information the title will scroll at the top.