To change partner authentication settings:
1. Right-click the device and select Change Partner Authentication Settings... from the shortcut menu.
2. Follow the wizard steps to change the authentication settings.
3. Select a partner node from the Partner list and specify the most appropriate authentication type (for more information, please refer to the Configuring StarWind Service Management Interface section).
4. Click OK to close the wizard.
Note: More information about CHAP authentication method is available here: http://technet.microsoft.com/en-us/library/cc957983.aspx