As an Office 365 admin, you can see whether there has been a service interruption or outage in your service. The Service health page shows current and past status of your Office 365 services.
Check out this short video that shows you how to see the status of Office 365 in the admin center.
You can also follow the steps below to see the status of all your services and their components:
From the Admin home page, click View service health.
On the Service health page, choose Current or History to view the status for today, or for the past couple of months.