SapphireIMS supports Desktop SSO with NTLM ( Integrated windows authentication IWA) and Web SSO using SAML 2.0, and oAuth2 protocols.
For Desktop SSO, please refer online help link -
https://www.sapphireims.com/help/Configure_SSO.htm
For Web SSO, please refer online help links -
https://www.sapphireims.com/help/Identity_Providers.htm
https://www.sapphireims.com/help/Configuring_Google_with_OAuth2.htm
https://www.sapphireims.com/help/Configuring_Office365.htm
https://www.sapphireims.com/help/User_Management_Overview.htm