Interested in understanding sizing considerations when combining Exchange Server 2007 HUB and CAS roles? The Exchange Center Of Excellence will present information on how they tested HUB/CAS scalability, including information about the testing tools and methodology, which will help anyone who is interested in doing scalability validation with their customers. The Exchange Center Of Excellence will share the split role scalability data from multi-protocol baselines that match and exceed MSIT server loads. The HUB/CAS scalability guidance for SP1 will also be provided.