Using the recent version of EdgeSWG or SGAC, when we go to the Realm for Windows-SSO, we get the message that this realm is not supported in this version.
The ProxySG Admin Console (SGAC) is intended to replace the Java Management Console for configuring the Secure Web Gateway (SWG) Edition. In versions up to 7.3.11.x, you can deploy SGAC via Management Center. In version 22.214.171.124 and later, you can launch the SGAC from the ProxySG appliance itself.(no need for Management Center).
In SGAC, some of the options under Configuration > Authentication has been removed. The most widely used options are still available, e.g. IWA, LDAP, RADIUS, SAML, etc. Windows SSO is one of the options that has been removed.
We are aware that Windows SSO is still in use at few customer installations so the support for the Realm has not been removed. It is still available via CLI (Command Line Interface). It is just that the new SGAC no longer supports it. Please use the CLI to view/configure/edit Windows SSO Realm. Here is the link that should help with the CLI syntax.