Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More
தீர்வுற்றது Archived

Intune Joined Devices on Firefox

tallen3

Hello,

Our organization is attempting to implement a Conditional Access policy that restricts access to certain websites to Intune joined devices only. The error message mentions that I need to enable a setting from within Firefox called Windows SSO, mentioned here: https://support.mozilla.org/en-US/kb/windows-sso. This setting is already enabled and I am still getting an error.

Is there anything else that could be causing this?

Hello, Our organization is attempting to implement a Conditional Access policy that restricts access to certain websites to Intune joined devices only. The error message mentions that I need to enable a setting from within Firefox called Windows SSO, mentioned here: https://support.mozilla.org/en-US/kb/windows-sso. This setting is already enabled and I am still getting an error. Is there anything else that could be causing this?
Read this answer in context

தீர்வு தேர்ந்தெடுக்கப்பட்டது

We had a similar issue. Even with Windows SSO enabled, Firefox needs to be version 91+ and the device must be Intune compliant. Also, check network.negotiate-auth.trusted-uris in about:config. Edge often works better with Conditional Access.

All Replies (3)

Would you mind opening a bug here:

https://bugzilla.mozilla.org/enter_bug.cgi?product=Core&component=Networking

The networking team can help research what is happening. We have lots of logging for this.

what version of Firefox are you using?

138.0.1. I opened the Bugzilla ticket here: https://bugzilla.mozilla.org/show_bug.cgi?id=1965984

தீர்வு தேர்ந்தெடுக்கப்பட்டது

We had a similar issue. Even with Windows SSO enabled, Firefox needs to be version 91+ and the device must be Intune compliant. Also, check network.negotiate-auth.trusted-uris in about:config. Edge often works better with Conditional Access.