Hi,
Greetings! have read your requirements to implement SSO login for your wordpress websites, i can help you to get it done. Do you verify that your downloaded plugin work with ADFS!
I am System Engineer with ten years exp. in system administration, and sound skills in windows servers, active directory, wordpress development and administration. I am also MCSA, AWS SA and CCNA certified.
If you like me to work on this, please ping me so we discuss and go ahead.
Thank you