Fix: ChatGPT Atlas Cannot Login with Microsoft Entra SSO (Conditional Device Access – CloudAPAuthEnabled)

Some users have reported that ChatGPT Atlas cannot sign in to enterprise apps that use Microsoft Entra SSO. The issue appears when organizations enable Conditional Device Access—a security policy that requires devices to be registered and compliant before logging in. When trying to sign in through Atlas, Microsoft blocks the authentication request because the browser does not pass the required device registration data.

What’s Happening?

Many companies use Microsoft Entra (formerly Azure Active Directory) with Conditional Access policies. If a device is not recognized as trusted or compliant, the login session is rejected.

👉 How about this error? ChatGPT Atlas Login Error Explained: The Server Certificate Could Not Be Verified

According to user feedback, ChatGPT Atlas does not currently pass CloudAP device registration information, which means Entra cannot verify whether the device is approved. As a result, any application requiring this security check will fail to open inside Atlas.

Symptoms

• Login pages load, but authentication fails
• Microsoft shows a compliance or device trust error
• Other browsers (Chrome, Edge, Safari) work normally
• Only apps behind Conditional Device Access are affected

👉 Are you also experiencing this error? API.BaseAPI.InternalRequestError error 1

Who Is Affected?

• Enterprise users using Microsoft Entra SSO
• Organizations enforcing Conditional Access / CloudAPAuthEnabled
• Users trying to access internal or corporate SaaS tools

Technical Explanation (Easy to Understand)

When Microsoft Entra checks if a device is trusted, it expects specific identity and compliance data to be passed through the browser. Most major browsers handle this correctly.

👉 Another error encountered by users: Atlas Browser Doesn’t Support 1Password or Keychain Yet

However, ChatGPT Atlas appears to skip or block device registration headers/tokens, so the login server cannot confirm compliance. Without that information, Entra treats the session as untrusted and blocks access—even if the device is legitimate.

Is This a Bug?

It appears to be an incompatibility or missing implementation rather than a user error. The issue has been reported by users trying to access work-related apps through Atlas.

👉 Also read: Import Bookmarks, Passwords, and History into ChatGPT Atlas

Workarounds (For Now)

• Use Chrome, Edge, or Safari for Microsoft Entra logins
• If your company allows it, use an app-specific browser override
• Contact IT admin to whitelist Atlas (not always available)

Impact

This issue prevents Atlas from being used as a primary browser within corporate environments, especially where strict compliance policies are required. For productivity and security-focused users, SSO support is critical.

👉 Hot issues: ChatGPT Atlas Is Not Supported on This Mac

Will This Be Fixed?

Because Microsoft Entra compliance and enterprise logins are widely used, this is likely to become a high-priority compatibility improvement for future Atlas releases. A fix may require passing CloudAPAuthEnabled data or enabling device identity handoff like other modern browsers.

What Users Can Do

• Report the issue through the OpenAI Support portal
• Check future ChatGPT Atlas Release Notes for SSO/identity compatibility updates
• Share logs or screenshots if asked—helpful for debugging

👉 Also learn: “You can’t use this version of the application with this version of macOS” on ChatGPT Atlas

FAQ

▶ Why does SSO work in other browsers but not Atlas?

Chrome, Edge, and Safari pass device registration data required by Entra. Atlas currently does not, so Microsoft blocks the login.

▶ Does this affect personal Microsoft accounts?

No. This issue applies to enterprise accounts with Conditional Access and device trust policies.

▶ Can this block access to work apps?

Yes. Any app that requires Microsoft Entra SSO with device verification will fail in Atlas.

▶ Should enterprise users avoid Atlas for now?

If your workplace enforces device compliance, you will need to use another browser until Atlas adds SSO compatibility.

👉 Learn: How to Keep ChatGPT Atlas Up to Date

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Have you experienced this issue? Share your feedback or check the latest Atlas releases — improvements and authentication fixes are rolling out frequently.