Hello Dyna might,
I have a concern regarding OneAgent as follows:
After reviewing Documentation https://www.dynatrace.com/support/help/platform-modules/infrastructure-monitoring/hosts/monitoring/o... I think it will be doable for the environment level for Deployed One Agents On Linux and Windows, for Windows the directory is unified and also for Linux in the current Project.
It's also applied for Host / Host Group and tenant Levels
I understand now, you want to be alerted when some server is decommissioned, if OneAgent is removed, you cannot monitoring process availability because it is done by OneAgent itself.
I think this is not a built function provided by Dynatrace, you need development your own Extension to be executed from ActiveGate.
Hi, please have a look at Enable alerting when OneAgent is down - Dynatrace Community, with links, where this has been discussed before and a workaround is suggested (that works).