How to view the quarantined devices waiting for the admin confirmation to access the account in Office 365?

Step 1: Sign into your Office admin account via https://portal.office.com

Step 2: Navigate to Exchange admin center.

Step 3: On the left pane, scroll down and click More features.

Step 4: Click open under Permissions.

Step 5: Click Mobile on the left pane.

Step 6: The devices will be listed on the Quarantined Devices area.