If Google and Yahoo don't want to lose users, analysts say, step it up.
How to get a new @outlook.com address, where to go for help, what devices and apps you can sync to the service.
Integration with SkyDrive, Office Web Apps crucial to strategy.
Microsoft Outlook.com gives Hotmail a major reboot, while Google brings the best features of Google+ to Gmail.
Microsoft has introduced its new foray into email, Outlook.com. One million people have already signed up to preview the service.
Updated email service could beef up Microsoft's cloud-based enterprise effort.
Launched on Tuesday in public preview mode, Outlook.com will eventually replace Hotmail, and Microsoft expects that it will also steal users from competing consumer webmail services like Google's Gmail and Yahoo Mail.
Even after giving Hotmail a huge facelift, Microsoft preps a replacement for it.