How to add host in OEM for which agent is already deployed

Hi All,
I had installed OEM 12c Cloud Control previously. From that OEM I had added certain host. While adding those hosts I deployed agents on them. Now I am not using that OEM anymore. I have freshly installed OEM again and now I want to add the same host. Is is possible to use the same agent which was deployed earlier on the host which I want to add as target. If yes, then what steps do I need to follow to add a host as a target in OEM for which an agent is already deployed. That means I want to by-pass the step which deploys an agent to the target host and reuse the already deployed agent.
Please guide!!

Yes this is possible. To use an installed agent with a new OMS you can follow these steps:
1. Shut down the running 12c agent with the below command:
$AGENT_INSTANCE_HOME/bin/emctl stop agent
2. Remove the agent instance home:
rm -rf $AGENT_INSTANCE_HOME
3. Manually remove the targets monitored by the agent in the EM console (sounds like you don't need to do this as the EM installation is no longer present)
4. Create a new instance home pointing to the new oms:
$AGENT_BASE_DIR/core/12.1.0.1.0/sysman/install/agentDeploy.sh
AGENT_BASE_DIR=<location of the agent base dir> OMS_HOST=<oms hostname>
EM_UPLOAD_PORT=<http/https upload port>
AGENT_REGISTRATION_PASSWORD=<registration password>
AGENT_INSTANCE_HOME=<absolute path where the instance home has to be created>
-configOnly
Regards, Mark.

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