This functionality was removed in Update 23.
Check the default external identity providers listed in the configuration in Smart API Manager. If your identity provider, such as SiteMinder, is not listed, you must add it.
In Server Manager, set the value of the Identity Provider property of the Web Client site settings using the GUID of the identity manager.
For information on getting the GUID for the identity provider, see Add external identity provider credentials to a user.
For information on editing the Web Client site settings, see Modify properties for a site.