First, make sure that all MS Outlook boxes are closed
Windows Desktop Search box > type 'control panel' > click the result that says 'control panel'
The Control Panel window will open > click Mail


Remove the affected email account




Re-add the affected email account






Note: Some popup boxes may appear during setup
If the popup prompts for password, double-check the address spelling in the popup box matches the one you are adding. Then enter the email password above.
If the popup prompts to allow a security certificate for ###.serverdata.net , click 'allow'.