Hi @Clifton Chong - Admin , is this document the one you followed to set SSO up? Please review these steps below and let me know what you find. I can help you more with some more information.
- Is the sign-out URL correct?
- Do you have multiple sign-in policies? They may be overwriting each other.
- Are you using SAML? Please check that you don't have conflicting configurations.
- Can you try this in different browsers with no plugins enabled?
Best, James