An error has occurred during report processing. (rsProcessingAborted)
Cannot create a connection to data source 'CDRDB'. (rsErrorOpeningConnection)
For more information about this error navigate to the report server on the local server machine, or enable remote errors
In order to make Reporting services truly highly available, you need to complete the steps below from this Microsoft TechNet article Associating Monitoring Reports with a mirror database in Skype for Business Server 2015.