Error in Webservice when using PST Importer "Client found response content type of 'text/html; c (50560)

Error in Webservice when using PST Importer "Client found response content type of 'text/html; charset=utf-8', but expected 'text/xml'."

This error appears when an  incorrect webservice URL/user account   has been specified.

Verify that the  URL and credentials are correct. To check:  

1. Verify the URL of the web service. For example:  http://archivemanager.yourcompany.com/defaultinstance/

2.  Ensure that the user  account  has Administrative Rights.

3. Confirm that the correct username and password has been specified.

4. Perform Test Connection.

N/A