SSO & IIS within Bookmarks of SSL

Hi All,

I was wondering if anyone had managed to get SSO via Bookmarks to transfer credentials into IIS on a Windows Server 2016 platform. I can use the custom fields in the Bookmarks to get SSO to pass through data on a Server 2008 R2 server running Exchange 2010 via OWA with no issue. I have ensured that the custom SSO fields are correct. In this case the username field is id'd with DomainUserName and password field is UserPass. Any variation does not work.

Many thanks