Actually I fond the systems that was "cleaned" up from the inactive agent task. How does oneself become inactive? the server itself was deleted and then found again, explains why it lost all tags and policies. So now the question is why did they become inactive?
Have you looked at the agent task confiugrations ? where is this task assinged ? Whats the ime period we specified for the agent to run ? has it changed ?
An inactive agent is one that has not communicated with the ePO server within a user-specified time period. Some agents might become disabled or be uninstalled by users. In other cases, the system hosting the agent might have been removed from the network. To perform the search, run the ePolicy Orchestrator query named Managed Inactive Agents.
(For information on queries, see Queries in the ePolicy Orchestrator Product Guide.) The default
configuration of this query reports systems that have not communicated with the ePO server
in the last month. You can specify hours, days, weeks, quarters or years.
When you find inactive agents, review their activity logs for problems that might interfere with
agent-server communication. The query results allow you take a variety of actions with respect
to the systems identified, including ping, delete, wake up, re-deploy an agent, etc.
CAUTION: If you force install a new agent, all previous policies and settings are lost.
MCAfee product guide