Periodically, check the overall health of the Office 365 environment. This is particularly valuable if certain files do not back up, as it provides information about compromised Office 365 service.
To view the Service Health report:
- Go to the Office 365 Admin Center.
- Click on Service Health.
The onscreen report provide the current status. If any of the organization’s services are degraded, this will be indicated by a yellow bar and detailed status in the report. If the services have no issues, this will be indicated by green bars.