While trying to open the outlook web interface (OWA) via any of it's various names (such as https://outlook.office365.com), I am eventually redirected to https://login.microsoftonline.com/. The firefox UI says the server cannot be found, however, if I watch the network trafic, it actually seems that the problem is SSL. The get to microsoftonline.com is marked as insecure (the lock icon has a red slash), even though the protocol is https. I can't figure out how to get more descriptive errors. I'm fairly sure this is a certificate problem. Chrome can access OWA, but every firefox installation on every device I have (linux and android) shows this error. Normally ssl problems give a popup that I know how to handle. I suspect that because this is part of an oauth dance, or because it's in the middle of a redirect chain, I cannot see the correct errors. Any ideas on how to fix this or to get more informative errors?