Scenario:
You may encounter an issue where the scheduled report no longer runs and when you check for the report schedule, it is no longer is visible in the Scheduled Reports page.

Cause:
This can happen if you modify or delete the report configuration globally.
When a report is e-mailed as part of a schedule, the e-mailed version is based on the report configuration at the time the schedule was created. Any changes you make locally to the report will not be reflected and, if you modify or delete the report globally, the schedule, which was based on the previous configuration, will be deleted. Therefore, it is recommended that you configure the report fully before creating a schedule for it.