Elasticsearch for email traffic reports: All email traffic reports can now be fetched using Elasticsearch option that helps increase the data collection speed.
Note: This feature will not be available if you update to 5611 using the service pack.
Scheduling issue in the Folder-wise Unread Mails with Subject report has been fixed.
Data collection issue in Exchange Online Inactive Distribution Lists report has been fixed.
An authentication bypass vulnerability affecting some of the REST API URLs has been fixed.
Existing customers, please download the service pack from here
Note: As this build comes with a security issue fix, customers are requested to update the software to the latest version as soon as possible.