Website webapp1.com has registered users with its own IdP implementation.
There are other websites such as webapp2.com, webapp3.com, webapp4.com (different domain).
A logged-in-user user1 of webapp1.com wants to do a SSO login to webapp2.com or webapp3.com or webapp4.com.
user1 has accounts in webapp2.com/webapp3.com/webapp4.com as well.
Is there a way to implement this using Azure AD or Azure AD B2C?
This is possible using PingIdentity.