Hi,
If you follow this link while logged into the forums(http://www.microsoftvirtualacademy.com/#fbid=nHiPpFjsZ_Z) and then click on the Sign In link in the upper right side
of the window, you'll then be prompted to allow the application to access your information related to the Microsoft account you're currently logged into the forums with.
Hopefully that helps get you logged into the MVA site. If not, take a look at this list of troubleshooting steps from the MVA site:
http://www.microsoftvirtualacademy.com/Help.aspx?type=troubleshooting-faq#fbid=nHiPpFjsZ_Z
There's an email address there that you can contact if you continue to have trouble signing into the site.
Good luck.
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