Configure ADFS (Active Directory Federation Services)
To use ADFS, perform the following: 
    - Configure Sitefinity CMS. 
    
        - Navigate to Administration » Settings » Advanced. 
 
        - In the left pane, expand Authentication » SecurityTokenService » AuthenticationProviders » ADFS. 
 
        - In Metadata Address filed, enter the ADFS Server address, concatenated by /federationmetadata/2007-06/federationmetadata.xml 
        For example, enter https://<your-ADFS-server.com>/federationmetadata/2007-06/federationmetadata.xml  
        - In Wtrealm field, enter the identifier of the relying party that  is to be configured in the ADFS server.
        For example, enter urn:sitefinity
         NOTE: In the ADFS configuration, the Wtrealm and the Relying party identifier must be the same.
         
        - In Callback path field, set the property to /Sitefinity/signin-custom.
 
        - Select the Enabled checkbox. 
 
        - In Auto assigned roles, enter a comma-separated list of the roles that will be automatically assigned to users, when they register with this provider.
        For more information about using auto-assigned roles together with user groups, see Use external authentication providers with user groups. 
        - Save your changes.
 
    
     
    - Configure the ADFS server.
    
        - On the ADFS server machine, open the ADFS Management application.
 
        - Add a new claims-based relying party for Sitefinity CMS.
        Enter the relying party data manually. 
        - Enable support for the WS-Federation Passive protocol.
 
        - Add endpoint for the relying party in the following way:
        https://<your-sitefinity-website.com>.com/Sitefinity/signin-custom.
        This must match the callback path configured in Sitefinity. 
        - Enter the identifier of the relying party.
        It must be the same as the Wtrealm field, configured in Step 1.d.
        For example,  urn:sitefinity. 
        - Close the Relying Party Trust window.
        The Edit Claim rules window appears. 
    
     
    - If the window does not appear, perform the following:
    
        - In the ADFS Management console, navigate to Relying Party Trusts.
 
        - Select the relying party for Sitefinity and click Edit Claims Issuance Policy.
        By default the list of claim rules is empty. 
        - Create a new claim rule of type Send LDAP Attributes as Claims.
 
        - Select Active Directory as attribute store and fill out the following:
 
        
            - User Principal Name (UPN) to be equal to Name ID (identifier) - this is mandatory and unique identifier used by Sitefinity CMS.
            
 
            - E-Mail Addresses to be equal to E-Mail Address - this is mandatory and unique identifier.
 
            - Display-Name to be equal to Name – This claim, and other claims, are optional.
 
        
    
     
RESULT: Next time when the login screen is displayed, it will have a button that you can use to login with ADFS.