If you wish to set up Single Sign On using Active directory Federation services you can use the guide supplied in this ticket (as a Word document).
If you were able to set up Active Directory Federation services and you are sure it is set up correctly, yet it does not work. You can contact us and we will check our Workspace365 backend for any issue's. Keep in mind that we can't help you with correctly setting up Active Directory Federation services. If you do wish to have assistance with correctly setting up Active Directory Federation Services, then you can contact Copaco Sales on either +31 (0)40 23 06 340 or using email.