Microsoft’s migration story for SBS 2011 can be found at this landing page:
The first live link on the site is for the SBS 2003 to SBS 2011 migration process.
- Microsoft TechNet: Migrate to Windows Small Business Server 2011 Standard from Windows Small Business Server 2003
We have already run the migration steps once through when we migrated our own SBS 2003 R2 Premium domain to an early release of the SBS v7 bits. For the most part things were fairly straight forward relative to our SBS 2003 to SBS 2008 migration guide.
We will be releasing an updated version of the Migration Guide for this process too as Exchange 2010 introduces a few nuances in the process.
Microsoft Small Business Specialists
Co-Author: SBS 2008 Blueprint Book