正解:
You need to configure the Exchange ActiveSync Access Settings.
Go to the Exchange admin center.
Click on Mobile in the left navigation pane.
On the Mobile Device Access page, click the Edit button in the Exchange ActiveSync Access Settings area.
Select the Quarantine option under When a mobile device that isn't managed by a rule or personal exemption connects to Exchange.
Optionally, you can configure notifications to be sent to administrators and a message to be sent to the mobile device user when a device is quarantined.
Click Save to save the changes.