We are running Rapid Recover 6.5 as well as version 6.5 at the client level.
We are looking for reports for change rate. I found this document, but when I went through the steps in the report I did not see a change rate column: https://support.quest.com/rapid-recovery/kb/233414/how-to-use-the-change-rate-and-internet-upload-and-download-speed-to-validate-if-the-bandwidth-meets-the-requirements-for-replication
