Outlook Manipulator will display this error can be one of two things:

  • Anti-Virus is preventing the authentication for working, in which case, you can check to see if you have an Anti-Virus software on your machine. This may be blocking the authentication attempt. You can turn it off or whitelist Outlook to allow the connection.


  • a MAPI error that indicates an error on the system and can often be resolved by running a repair on your Outlook installation. To do this, follow these steps:


  1. Click on your Start menu and open the Control Panel
  2. Click on Uninstall a Program
  3. Locate the entry for Microsoft Office and click on it. After you click on it, you should see a button labeled Change appear either next to it, or at the top of the list (depending on what version of Windows you have). Click this Change button.
  4. Once Microsoft Office setup appears, choose the Repair option and click Next to have Microsoft Office repair itself. You may need to reboot your computer once this process is complete; Microsoft Office setup will tell you if you need to do this once it is done.

Once you run this repair, try authenticating again and it should work.