An agent apparatus for communicating with a managing system comprising: a communication unit configured to receive a periodically transmitted specific keep alive message from the managing system and to forward event reports; an event dispatching unit configured to switch an operation mode of the agent apparatus between an event forwarding mode and an event logging mode; and a control unit configured to control the agent apparatus, a temporary memory means and a persistent memory means, wherein, in the event forwarding mode, the control unit is configured to cause the communication unit to insert the event reports into the temporary memory means and to subsequently forward the event reports to the managing system, and in the event logging mode, the control unit is configured to store the event reports in a persistent memory means, and wherein the event dispatching unit is configured to switch the operation mode of the agent apparatus from the event forwarding mode to the event logging mode when the communication unit does not receive the specific keep alive message within a predefined time period, and the event dispatching unit is configured to switch the operation mode of the agent apparatus from the event logging mode to the event forwarding mode when the communication unit receives the specific keep alive message, wherein both operation modes use the same pre-defined managing system specific filter criteria regarding the selection of the event reports, and wherein the criteria are received from the managing system in a subscription request at a start time of the manager-agent communication or are locally preconfigured in the agent apparatus. a communication unit configured to receive a periodically transmitted specific keep alive message from the managing system and to forward event reports; an event dispatching unit configured to switch an operation mode of the agent apparatus between an event forwarding mode and an event logging mode; and a control unit configured to control the agent apparatus, a temporary memory means and a persistent memory means, wherein, in the event forwarding mode, the control unit is configured to cause the communication unit to insert the event reports into the temporary memory means and to subsequently forward the event reports to the managing system, and in the event logging mode, the control unit is configured to store the event reports in a persistent memory means, and wherein the event dispatching unit is configured to switch the operation mode of the agent apparatus from the event forwarding mode to the event logging mode when the communication unit does not receive the specific keep alive message within a predefined time period, and the event dispatching unit is configured to switch the operation mode of the agent apparatus from the event logging mode to the event forwarding mode when the communication unit receives the specific keep alive message, wherein both operation modes use the same pre-defined managing system specific filter criteria regarding the selection of the event reports, and wherein the criteria are received from the managing system in a subscription request at a start time of the manager-agent communication or are locally preconfigured in the agent apparatus.