If I have an existing Exchange 2007 Email Address Policy that generates an email based on Company and I update an existing user's Company field to match, when does the user get updated and by what process?Thanks

Either (next-to) immediately or as a scheduled action. No more RUS. Yes, Exchange 2007 really enforces Email Address Policies http://msexchangeteam.com/archive/2007/01/05/432086.aspx A bit more here:In Exchange 2003, RUS is used to update e-mail addresses for recipients. This service processes e-mail address policy in an asynchronous way, which can be unreliable and unpredictable. Exchange 2007 doesn't rely on RUS to update e-mail addresses any more, instead it uses a predictable, synchronous e-mail provisioning process. Once an e-mail address policy is changed, the e-mail addresses for all associated recipients are updated synchronously. Exchange 2007 policieshttp://msexchangeteam.com/archive/2006/11/21/431608.aspx MCTS: Messaging | MCSE: S+M | Small Business Specialist

Yes, it depends on how do you set the email address policy. It can be immediately or a scheduled time.