
User17121497992271235751 (Customer) asked a question.
I'm a developer in Okta's dev account, and I'm trying to authenticate users from another Okta organization (client's org) using OAuth 2.0.
I have created an OAuth app in my Okta account and shared the client ID and secret with the client (admin) from another Okta organization. The admin is trying to authenticate, but they receive an error message: 'Unable to sign in
I have checked the Okta OAuth app's redirect URIs, client ID, and client secret. I also verified that the scopes (e.g., okta.users.read) are configured correctly. The app works when assigned to users in my organization, but when the client (from another Okta org) tries to authenticate, it fails.
Can anyone guide me on what I need to configure to allow external Okta organizations to authenticate successfully using OAuth 2.0? Do I need to assign users from the client’s Okta org to my app, or is there another configuration needed?

Hello @User17121497992271235751 (Customer) Thank you for posting on our Community page!
This question is more appropriate for our dedicated Okta Developer Forum.
My advice would be to reach out via devforum.okta.com to take advantage of their expertise.
While we'll do our best to answer all of your questions here, this medium is more inclined towards Okta core products and features (non-developer work).
Thank you for reaching out to our Community and have a great day!
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