SSO across your apps: one tenant, shared session, and logout that actually logs out

TL;DR

Different tenants = no shared session. - Each app registered with its own callback URLs; the session is tenant-wide, the app configs are per-app. - Consistent connection availability: if app B does not enable the connection the user used on app A, the silent login fails and the user sees a confusing error.

Steps

1. - All apps same tenant, connections enabled on each.

• Logout story written down and tested across two apps, not assumed.

When to use

You are seeing this: Register each app (web, SPA, mobile) in the SAME tenant. Use this skill when you run into "SSO across your apps: one tenant, shared session, and logout that actually logs out".

When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.

Auth0's SSO docs describe the shared SSO session across applications in a tenant and the session layer behavior. Enterprise connections and Organizations SSO are in the respective docs. Verified against live docs 2026-09-26.