AOC Aon Corp.

Aon Selects Authoria to Deliver Web-based Compensation Management Solutions for Clients CHICAGO and WALTHAM, Mass., May 20 /PRNewswire-FirstCall/ -- Aon Consulting, the human capital and management consulting organization of Aon Corporation (NYSE:AOC), has announced that Aon's Human Resources (HR) Outsourcing group has formed a strategic alliance with Authoria, Inc., a leading vendor of integrated strategic Human Capital Management (HCM) solutions. This alliance, which adds Authoria's Web-based compensation management solution to Aon's expanding suite of integrated HR outsourcing solutions, is the latest development in the growth and evolution of Aon's HR outsourcing capabilities. (Logo: http://www.newscom.com/cgi-bin/prnh/20041215/CGW049LOGO ) Aon selected Authoria Compensation Advisor(TM) to offer its clients a complete compensation management solution, encompassing salary, incentive, equity and long-term plan design, calculation, manager recommendations and employee communications. Plan administrators can create plans, model their potential impact, assign employees to plans, and monitor the approval process, all from a single application. Authoria Compensation Advisor is delivered as part of a comprehensive on-demand service, called Advisor On-Demand(TM). Delivering Compensation Advisor through Advisor On-Demand will help Aon's clients avoid time- and resource-consuming installations, software upgrades and maintenance. Clients will be able to take advantage of an application deployment environment that is both fully managed and adaptable -- a business imperative in today's competitive global marketplace. Roger Vaughn, U.S. president, Aon Consulting stated, "Compensation structures are growing more and more complex, and clients need applications that can be easily customized so that compensation managers can act more strategically. Our partnership with Authoria will allow us to bring organizations the most robust compensation management solution to help us continue to bring distinctive value to our current and future outsourcing clients." Tod Loofbourrow, president and CEO of Authoria, said, "Our experience has shown us that customers are seeking exactly the kind of high-quality, comprehensive, integrated HR solutions that this partnership provides. Offering Compensation Advisor through Advisor On-Demand allows Aon's clients to dramatically lower their total cost of ownership, limit the drain on internal resources, and still receive the flexibility they require." About Aon Aon Corporation ( http://www.aon.com/ ) is a leading provider of risk management services, insurance and reinsurance brokerage, human capital and management consulting, and specialty insurance underwriting. There are 47,000 employees working in Aon's 500 offices in more than 120 countries. Backed by broad resources, industry knowledge and technical expertise, Aon professionals help a wide range of clients develop effective risk management and workforce productivity solutions. Aon Consulting is among the top global human resources consulting firms, with 2004 revenues of $1.247 billion and 7,000 professionals in 120 offices throughout the world. Aon Consulting delivers integrated consulting solutions to help clients with employee benefits, human resources outsourcing, compensation, communication and management consulting. About Authoria Authoria is the leading provider of integrated strategic human capital management (HCM) solutions helping employers increase the business value of their workforce. The Authoria Advisor Series includes performance and compensation management, succession planning, and benefit and policy communication while providing just-in-time knowledge and coaching for managers and employees. Through Authoria Choice, applications are delivered as a fully managed on-demand service, or as an on-premise deployment. Authoria's award- winning solutions have proven successful for more than 200 large employers, representing more than 7.5 million employees. Customer companies include Boeing, Pfizer, and Unocal. For more information, visit http://www.authoria.com/ . Contact: Dana Sohn, Aon Consulting, +1.312.381.4786, This press release contains certain statements related to future results, or states our intentions, beliefs and expectations or predictions for the future which are forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from either historical or anticipated results depending on a variety of factors. Potential factors that could impact results include: general economic conditions in different countries in which we do business around the world, changes in global equity and fixed income markets that could affect the return on invested assets, fluctuations in exchange and interest rates that could influence revenue and expense, rating agency actions that could affect our ability to borrow funds, funding of our various pension plans, changes in the competitive environment, changes in commercial property and casualty markets and commercial premium rates that could impact revenues, changes in revenues and earnings due to the elimination of contingent commissions, other uncertainties surrounding a new compensation model, the impact of regulatory investigations brought by state attorneys general and state insurance regulators related to our compensation arrangements with underwriters and related issues, the impact of class actions and individual lawsuits including client class actions, securities class actions, derivative actions, and ERISA class actions, the cost of resolution of other contingent liabilities and loss contingencies, and the difference in ultimate paid claims in our underwriting companies from actuarial estimates. Further information concerning the Company and its business, including factors that potentially could materially affect the Company's financial results, is contained in the Company's filings with the Securities and Exchange Commission. http://www.newscom.com/cgi-bin/prnh/20041215/CGW049LOGO http://photoarchive.ap.org/ DATASOURCE: Aon Corporation CONTACT: Dana Sohn of Aon Consulting, +1-312-381-4786, Web site: http://www.aon.com/

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