When using a cloud service, understanding the reliability of the service is vital.  Windows Intune is a management tool and as such, when the service is down it is only management that cannot be performed, rather than the computers going offline themselves, which means the impact is much less to the end users.

The Service Status Page provides that information for Windows Intune.  You can see on the image below that you can also scroll back over the last 5 weeks to see what has happened.  The good thing here is that it is a sea of green for the last 5 weeks

Hopefully it will stay that way.  You can also see that there are at least two datacenters for each region, so an outage at one should not stop the service working.

ttfn

David