# What is the Standard Operating Procedure (SOP) to bring back the deleted devices into managed devices? Explain the concept between agentless and agent discovery protocol on this operation?

**URL:** <https://community.sapphireims.com/t/what-is-the-standard-operating-procedure-sop-to-bring-back-the-deleted-devices-into-managed-devices-explain-the-concept-between-agentless-and-agent-discovery-protocol-on-this-operation/352>\
**Category:** General\
**Tags:** how-to\
**Created:** [March 8, 2021, 10:55am UTC](https://community.sapphireims.com/t/what-is-the-standard-operating-procedure-sop-to-bring-back-the-deleted-devices-into-managed-devices-explain-the-concept-between-agentless-and-agent-discovery-protocol-on-this-operation/352 "2021-03-08T10:55:35Z")\
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**Author:** ![harish](https://avatars.discourse-cdn.com/v4/letter/h/47e85d/32.png) [@harish](https://community.sapphireims.com/u/harish)\
**Post date:** [March 8, 2021, 10:55am UTC](https://community.sapphireims.com/t/what-is-the-standard-operating-procedure-sop-to-bring-back-the-deleted-devices-into-managed-devices-explain-the-concept-between-agentless-and-agent-discovery-protocol-on-this-operation/352/1 "2021-03-08T10:55:35Z")

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Agentless Devices: Navigate to ‘Settings → Node Operations → Deleted Devices’ and select the respective device and click on ‘Add to Monitor’. This will internally initiate a rediscovery process of the device to make it managed devices. If required prerequisite not met, then it will move to unmanaged devices

Agent Device: ‘Add to Monitor’ option may not work for agent- based devices as we don’t know if the agent is uninstalled/reinstalled in the end point.