Starting two weeks ago i cannot not login to vso using my account, i got this message
"VS400664: Sorry, we were unable to retrieve a configured identity provider for you to use when creating an account. If the problem persists, check your web browser security settings. You may need to add https://tfsprodch1acs01.accesscontrol.windows.net to your trusted zones.
Refresh"
Note that i can access using google chrome, but this error come just in internet explorer (8) or from visual studio when try to login,
when i try to browse to https://tfsprodch1acs01.accesscontrol.windows.net using IE i get "Internet explorer cannot display the webpage" but i can browse using chrome.
IE8 is not supported by VSO or TFS 2012+.