A company has an on-premise Exchange Server 2010 SP1 environment and an Active Directory Domain Services (AD DS) domain. Client computers run Microsoft Office Outlook 2003. The company plans to migrate mailboxes to a cloud-based Exchange Server 2010 SP1 service. You need to recommend a solution for ensuring that the global address list (GAL) in the on-premise and cloud- based environments are identical.
What should you recommend?
A.
Synchronize the AD DS directory from the on-premise environment.
B.
Synchronize the AD DS directory from the cloud-based environment.
C.
Install and configure an SMTP connector in the cloud-based environment.
D.
Install and configure the Exchange Online Connector for Office Outlook 2003 in the on-premise environment.