Single sign-on (SSO) for CircleCI allows organization administrators to control access for their CircleCI organization using an Identity Provider (IdP). This article provides troubleshooting steps to check when you encounter the following error message during setup.

Please confirm that the domain which you want to set to your organization is not used for any other organizations.

If your IdP does not support returning authentication state parameter from the callback request to CircleCI, please enable the Enable IdP authentication state bypass.