
LoyM.52958 (Customer) asked a question.
We have some customer applications and each customer already have sso vendor for their apps.
Some customer use Okta, someother auth0 likewise.
We need to configure sso in our application which need to authenticate to our customer users using our Okta vendor.
(eg).
- SignIn with customer1 app. ( customer1 have okta)
- SignIn with customer2 app ( customer2 have auth0)
I have added customer1 Okta as an External Identity provider(Add OpenId Connect IdP) in my Okta. But no idea how to proceed next steps.
https://developer.okta.com/docs/concepts/identity-providers/
Does my okta account automatically redirect to my customer okta account and authenticate with their user, then redirect to my application?
Is it possible communicate one okta to another okta org?

To allow users from different identity providers (including different Okta orgs) to access an application in one Okta org, you can set up external identity providers (for Okta orgs, you can either use the Org2Org app to create a SAML Idp or you can configure an OIDC IdP to point to that org).
Once these Identity providers are configured, you can create Routing Rules that will be used to determine which Identity Provider a given user will be routed to for authentication when user is redirected (SP-initiated flows, such as an /authorize request made by an OIDC app) or goes directly to your Okta org (so they can launch their applications from within Okta). For example, if you have added the Google IdP to your org, you may want to automatically route users whose login (email) domain is gmail.com to the Google IdP.