See the Configuring schedule emails section of the online Help for details of using the System-wide email notification data flow. The 'Data360 Failed Schedule Email Notification' data flow is available to Analyze Server instance users who are provisioned with the Administrative role.
In general, outputs (values) from a data flow are not available to a follow-on data flow. There is a roadmap candidate to deliver enhancements in this area (a.k.a Data Flow as a Service functionality).

This data flow is used to send an email notification when a data flow Fails. The data flow is run by the Analyze system when the on failure action for a scheduled data flow is configured to send an email (as opposed to running a user-defined 'on failure' data flow.
The properties for the Send Email node in the 'Data360 Failed Schedule Email Notification' data flow are shown below:
