In the left pane of Sybase Central, expand MobiLink 12, your MobiLink project name, Synchronization Models, and then select your synchronization model name.

Open the Authentication tab in the right pane.

Select Enable Custom Authentication For This Synchronization Model.

Select the server that you want to authenticate to.

Enter the appropriate host, port, and URL information in their respective fields.

For more information about these fields, see External authenticator properties.