Microsoft is to further improve on security by add a two stage verification to it's Microsoft accounts:
You may not see any changes as of yet. I checked my account and the option isn't yet available.
Ref:
Microsoft Account Gets More Secure - The Official Microsoft Blog - Site Home - TechNet...
connected
devices
management
microsoft
office
outlook
protection
security
skydrive
skype
two-step
upgrade
user account
user experience
verification
windows
xbox