4.4.2. Transition to a Different Protocol

In general, the transition to a different protocol is performed by the user logging in to a service using one of the current login methods and then they login again using the new protocol. This way, the service provider can assign the existing user a new protocol identifier.

Transition from OpenID 2.0 protocol to the new OpenId Connect protocol

If you want to transition from the original OpenID 2.0 protocol to the latest OpenID Connect, send an identity authentication request via the OpenID Connect protocol with the scope parameter extended with an openid2 value, and you will receive an OpenID 2.0 identity together with an OpenID Connect identity.

More details about the migration process can be found in these specifications.