I feel the need to state what is probably already obvious to the HN crowd: Microsoft did not invent the idea of lawful interception. It is used in full force for both fixed and mobile networks, and select government agencies can call carriers to get records and do live wire tapping.

http://en.wikipedia.org/wiki/Communications_Assistance_for_L...

http://en.wikipedia.org/wiki/Lawful_interception

Microsoft's premise is that the techniques used for VoIP are different then traditional lawful interception, but I don't think anything described in the patent is non-obvious. Nonetheless, they will probably get it awarded, as more then 50% of patent applications do (forgot where I got the statistic from), and even more when its from large tech corporations that have dedicated in-house patent lawyers filing the patent applications.

When you think about it, the USPTO gets money from awarding patents and collects yearly fees through the 20-year life of a patent, and the army of patent examiners they have on staff do not come cheap (starting salaries range from 52-79k), and for the most part they are self-funded and do not rely on U.S. Congress money - so there is every incentive in the system for them to award every patent applied for.