I have a proxy server setup so all my users on my network go through it so I can capture http traffic. However, a couple days ago, a couple users that are allowed to use e-mail for business purposes were not able to login to hotmail. Any other e-mail service works great, gmail, yahoo, etc. If I bypass the proxy server I can login to hotmail no problem. Any suggestions on fixing this are welcomed.
attached is a screenshot of the page when accessing through proxy server