Here is a list of issues that were fixed in this release - build 2.6.15.

Issue Key Description
AVSUPPORT-30643 Emails for a specific user were not available in the portal. The user had provisioning errors in O365 Exchange, which caused issues in fetching the user details. A retry mechanism was implemented to fetch details in other methods for such cases.
AVSUPPORT-31934 Multiple alerts were generated for an email that was marked by the GTB DLP engine - one per each recipient.