
5a9we (5a9we) asked a question.
I am integrating an oidc-like identity platform into OKTA as an IDP.
To let OKTA can talk to the identity platform, I wrote a gateway between the identity platform and OKTA.
It works fine.
However, the identity platform provided a "back to system" button, which is a Cancel button for user, and I don't know how to tell OKTA that the user has been cancelled login action in the IDP.

Rares here from Okta Support.
The closest potential resolution would be to configure the SLO functionality in the OIDC app that is linked with the "back to system" button.
Check the following article: Configure Single Logout in app integrations | Okta
I am recommending opening a ticket with us for a better understanding of your configuration.
My sincere appreciation.