The Microsoft Certified Master program for Exchange Server 2010 was known as Exchange Ranger in a previous incarnation.
"Training for MCM program provides you the most intensive Exchange experience that includes three weeks of on-site instruction by the best Exchange experts -- PMs from Exchange engineering teams, consultants, architects and senior support folks with a treasure trove of design, deployment and troubleshooting practices," Microsoft stated.
To get an insider's view of MCM Exchange? Watch the Microsoft Learning's recently posted video entitled "Microsoft Certified Master - Insider's View" embedded below:
The MCM | Exchange 2010 rotations are on. You can find more details in Microsoft Certified Master: Exchange Server 2010.
[Source: Exchange Team Blog]