To configure SAML Authentication, do the following:

1. Open the ‘Services Configuration’ window.

2. Double-click the ‘SAML Authentication‘ service. 

3. In the opened window, enter values of the inputs: “IDP Type“, “Check Signature“, “Check UPN“, “Check Expiration“, “Certificate Thubmprint” and check “Enabled” checkbox.
Example: 

4. Click the ‘OK‘ button to save changes.