hi, unfortunately MS has misconfigured a security feature (OCSP stapling) on their servers and is sending you an expired assurance about the validity of their certificate to your firefox.

in order to resolve that, please enter about:config into the firefox address bar (confirm the info message in case it shows up) & search for the preference named security.ssl.enable_ocsp_stapling. double-click it and change its value to false - this will degrade a security feature in firefox, so please revisit it in a couple of days again after microsoft has fixed their stuff and turn it back on again then...

cheers, i was just trying to create an account, I did find it interesting that the other account does log in, its just the live account that does not work. thanks for your help.

Eze

I don't think this is a Microsoft problem.

On Windows10 Date & Time settings, if you change this setting Set Time Zone Automatically to true Suddenly Firefox allows the login to Hotmail

Unfortunately I don't want Microsoft Geo-locating me, so I'm leaving that set to false and using the firefox config fix by lowering security setting (above).

This appears to be a firefox problem.