Microsoft released a new hotfix yesterday for SCOM 2019. Specifically to handle a few items which appeared after some new features were released around alert management.
The items in this fix:
- User will be able to edit columns on closed Alerts irrespective of Health State.
- Alerts can now be closed if the underlying Monitor’s Alerting is disabled which was not possible earlier.
- Overridden Monitor Alerts can now be closed if Alerting is disabled for underlying Monitor, irrespective of Monitor Health State.
- User now gets appropriate Exception message on Web console when monitor based alerts are closed with unhealthy monitors.
- Automatic Alert Resolution: Segregating Rule based alerts and monitor based alerts.
- Automatic Alert Resolution: Monitor Based Alerts cannot be closed until monitor is healthy
Have a look at the more extensive description of the issues at hand with examples written down by the product group:
https://techcommunity.microsoft.com/t5/system-center-blog/changes-in-alert-management-of-scom-2019/ba-p/1271326#
The KB article description here:
https://support.microsoft.com/en-us/help/4551468/system-center-operations-manager-2019-hotfix-for-alert-management
Which also includes a link to the patch and how to apply it.
Keep in mind this is a hotfix on top of 2019 UR1.