HOTSPOT
A company has an on-premises deployment of Microsoft Exchange Server 2010 with Service Pack 3. The company is migrating to Office 365.
During the migration, users must be able to see availability information between the on-premises deployment and Office 365.
You need to identify the appropriate mailbox migration strategy to use.
Which migration strategies are supported for this scenario? To answer, drag the appropriate answer choices to the correct targets. Each answer choice may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
Hot Area:
deployment and Office 365 is a remote move migration. over a longer period of time, you can take advantage of these hybrid deployment features during the transition.
Answer: 
Explanation:
The only migration method that enables users to see availability information between the on-premises
A remote move migration is used to migrate on-premises Exchange mailboxes to Exchange Online in an
Exchange hybrid deployment. You must have an Exchange hybrid deployment to use a remote move migration.
With a hybrid deployment, you get the following capabilities:
Even if you plan to permanently move your on-premises email organization to Exchange Online and Office 365
References: https://technet.microsoft.com/en-us/library/jj863291(v=exchg.150).aspx