Here is the list of new features and enhancements.

Multithreading while pulling in data from Netskope.
Notification in the UI when RabbitMQ reaches free disk space limit.
Support for pulling in historical data from specified datetime range in Log Shipper
Dedicated worker for ingestion of historical data.

Restrict RabbitMQ free disk space limit to 2GB by default.
Restrict memory of RabbitMQ docker container to 2GB by default.
Maintenance window is split into chunks of 15 minutes and added to historical queue if it ever exceeds 15 minutes.

Netskope Cloud Exchange Release Notes Version 3.1.5