Sync Exchange Office 365 Contacts with other business apps | SyncPenguin | Two-way sync and migration of meetings, contacts and tasks from cloud calendar, ERP, CRM, eCommerce apps
O365 Hybrid - Exchange Federation Trust - Active Directory FAQ
How to migrate from Exchange 2010 to Office 365 - step by step guide
Build Your Own LAB: Deployment & Migration to Microsoft Office 365 Cloud – Part 4 - Azure365Pro.com
Moving from Exchange 2010 to Office 365 | Jaap Wesselius