Thomas Deml fra the IIS team did a great presentation af TechEd 2010, with this topic.
Get pptx here and see the full presentation from TechEd Online here.
Read the IIS blog about the presentation.
About Author
Peter Schmidt
Peter is an Exchange specialist with over 15+ years of experience with Exchange Server and certified Microsoft Certified Master (MCM) and Microsoft Certified Solutions Master (MCSM) on Exchange Server. He has been awarded the Microsoft MVP award, every year since 2007. He is active in the Microsoft community and User Group Leader for CoLabora (a danish UC & Cloud User Group). He works as an Cloud & Infrastructure Architect and Consulent, with primary focus on Exchange, Office 365, Azure and Skype for Business.