I have a SBS 2011 server. I just purchased a new 2012 r2 windows server and purchased office 365. What is the best process to migrate to Office 365 and to the new windows server 2012 r2? I want to use single sign on (SSO) as well. The new 2012 r2 server will be the new domain but Office 365 will be hosting exchange instead of an on premise exchange. Any guide as what to do first and any links to documentation for the migration process would be great. Thanks.