A new release of Qualys Cloud Suite 8.16 is scheduled to be released in production on the EU Shared Cloud Platform 1 on Jan 04, 2019.
The deployment is completely transparent to users and will require no downtime.
In rare cases, there is a small chance of impact to reports which are running when the maintenance is performed. If your report ends in error during this time, please rerun the report to gather the desired information.
Please find the release notes here: https://www.qualys.com/docs/release-notes/qualys-cloud-suite-8.16-release-notes.pdf