Service portal

[harshalpatil15]

Which certificate-based authentication methods can be enabled so that users can log into the Service Portal

[Sandeep Rajput]

@harshalpatil15 If you are referring to SSO then please refer to these posts https://docs.servicenow.com/bundle/washingtondc-platform-security/page/integrate/single-sign-on/conc... to know more about the steps to integrate SSO. 

https://www.servicenow.com/community/developer-blog/servicenow-sso-integration-sso-implementation-in...

Hope this helps.