Beginning today, Hotmail is providing users with the option to enhance the security of their entire Hotmail session with HTTPS data encryption (via secure socket layers, or SSL), which is currently used to help secure users' Hotmail sign-in.
Also starting today, SkyDrive, Photos, Docs, and Devices pages all
automatically use SSL encryption, transferring all their data over HTTPS.
To enable HTTPS for a Hotmail inbox, calendar, and contacts, users can go
to https://account.live.com/ManageSSL. Once they enable this feature, all
of their future connections to Hotmail will be delivered over SSL.
However, some connections to Hotmail won?t be available if someone turns
on HTTPS Microsoft said. These are Outlook Hotmail Connector, Windows
Live Mail and the Windows Live application for Windows Mobile (version 6.5
and earlier) and Symbian.