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No Access to Sharepoint After Update to FireFox 30 on Mac

Posted by Jeremy Pratt on Tuesday, June 17, 2014 in Outage.

The FireFox 30 update for Mac disables support for the NT LAN Manager version 1 (NTLMv1) network authentication. This may affect SharePoint-based or IIS-backed intranet applications. If you encounter any problems on Firefox 30 or later, you can manually enable NTLMv1 using a preference.

To enable NTLMv1: type about:config in the location bar, click the “I’ll be careful” button, find network.negotiate-auth.allow-insecure-ntlm-v1, double-click on it to change the value to true.

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