Looking to win more users for its Live Meeting Web conferencing service, Microsoft Tuesday introduced three additional licensing models.Looking to win more users for its Live Meeting Web conferencing service,\u00a0Microsoft\u00a0Tuesday introduced three additional licensing models.U.S. customers can now also choose to license named users, virtual meeting rooms or sign up for a block of monthly minutes. Microsoft previously offered Web conferencing only on a per-minute basis or unnamed user licensing, which allows users to host meetings with up to a set number of participants at anytime.The named user model is aimed at heavy Web conferencing users, such as sales people. Meeting rooms are good for events, or for newcomers to Web conferencing and monthly minute bundles offer discounts to customers who commit to buying packages of minutes, according to Microsoft.Microsoft has been trialing the new licensing options since February, said Jennifer Callison, director of product management for Live Meeting at Microsoft. "Customers are very receptive to the new models. We try to understand their usage pattern and then try to match the pricing model with their needs," she said.Additionally, Microsoft has renamed its Presenter and Premier Live Meeting product levels to Standard Edition and Professional Edition, respectively, to fit with the Office naming convention. Professional Edition offers application sharing control, recording and printing of meeting content, Standard Edition does not, Callison said.Live Meeting is sold directly by Microsoft online as well as\u00a0partners including MCI\u00a0and Intercall. The meeting room and named user models are also available under Microsoft's Enterprise Agreement and Select volume licensing programs, the company said.Microsoft entered the Web conferencing fray when it\u00a0acquired PlaceWare\u00a0last year. Web conferencing is a burgeoning market with several players including WebEx Communications, Cisco and Raindance Communications.Last year the Web conferencing market generated $472 million in revenue, which is expected to grow to $3 billion in 2010, according to consulting firm Frost & Sullivan. WebEx controlled 67% of the market last year, far ahead of Microsoft, which came second with 16.5%, according to Frost & Sullivan.License optionMaximum Meeting SizeMinimum purchasePricing - Professional Edition Pricing - Standard Edition Named User15 (only one meeting per named user at a time allowed)5 names$300 per user per year, which can go down to $100 per user per year when bought in volume, plus $3,000 annual fee.$180 per user per year, which can go down to $90 per user per year when bought in volume, plus $3,000 annual feeRoom2,000 (only one meeting at a time allowed)User can buy only 1 room.Limited (no more than 15 meetings a month) starts at $10,000 for 50 seat room per year.Unlimited (no maximum on meetings) starts at $30,000 for 50-seat room per year.Limited (no more than 15 meetings a month) starts at $6,000 for a 50 seat room per year.Unlimited (no maximum on meetings) starts at $18,000 for a 50-seat room per yearMonthly MinutesUnlimited capacityMonthly use it or lose it commitment. No penalty for going over purchased minute bundle.Starts at $0.45 a minute.Starts at $0.35 a minute.