Course Auto-Archive performance and efficiency improvements

Blackboard Learn SaaS Continuous Delivery v3900.15.0 | Release to Production 3 June 2021
Ultra Experience, Original Experience

This improvement fixes known issues causing archive-related instability and implements a safety-net to stop archiving courses that repeatedly fail. It also improves efficiency of auto-archives by adding more sources that the system can store as a reference instead of copying them as file data. Last but not least, it ensures that auto-archives are enabled for all sites as part of each release.