Online whistleblowing site Cryptome leaked an internal Microsoft document "Microsoft® Online Services Global Criminal Compliance Handbook" having information regarding what user-activity records Microsoft keeps for their online services and for how long in compliance with legal authorities, the site labeled the document microsoft-spy.zip but was soon taken down by their hosting provider after receiving an DMCA copyright infringement take-down notice from Microsoft.
However, the site is now back online and still hosts the microsoft-spy.zip along with various other "spying guides" like yahoo, Paypal, MySpace and Facebook to name a few.