I am facing issue of DLP Monitor Incidents are visible after upgrading the DLP Manager/Monitor appliance from 8.7 to 9.0. Let me know if guys have also gone through similar issue and got it resolved.
You may already have an answer for this one, but you will lose your incidents when you upgrade from 8.7 (probably 8.6 patch 1) to 9.0. If there are specific incidents you want to preserve, you can put them in a case. That information will be preserved through upgrade.
Hope this helps.