DRAG DROP
You have an Office 365 tenant. An organization is migrating from an Exchange organization to Office
365.
Users report that Outlook does not display the availability of other users for meetings. You must
determine whether an Office 365 mailbox can access the scheduling availability of a user with an onpremises mailbox. You must also run a test to verify that an on-premises mailbox can access the
scheduling availability of a user that has an Office 365 mailbox.
You need to conduct the tests.
What should you do? To answer, drag the appropriate test to run to the correct mailbox test scenario.
Each test 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.
Answer: 
Explanation:
https://testconnectivity.microsoft.com/
I would say the new exam question will also list the ‘free/busy’ test in the Office 365 TAB of the Remote Connectivity Analyzer.
The “Exchange Web Services test” is listed under the Exchange TAB in the RCA.This is the protocol you wan to test connecting to the Exchange mailbox.