You plan to perform a remote move migration to Microsoft Exchange Online.
Which three actions must you perform first? (Each correct answer presents part of the solution. Choose three.)
A. Configure an on-premises Exchange 2013 CAS/MBX server.
B. Configure an on-premises Exchange 2010 server.
C. Configure SMTP domains in the Office 365 tenant.
D. Configure an on-premises Exchange 2007 server.
E. set up the Windows Azure Active Directory Sync tool.
