By default, OpManager manages all the discovered devices. However, there might be some known devices that are under maintenance and hence cannot respond to status polls sent by OpManager. These devices can be set to unmanaged status to avoid unnecessary polling. Once maintenance gets over, they can be set to managed status.
To unmanage a managed device:
- Go to Inventory > Devices > Device snapshot page
- Click the Menu icon and select Unmanage.
This stops the status polling and data collection for the device and changes the device status icon to grey.

To start managing an unmanaged device:
- Go to Inventory > Devices > Device snapshot page
- Click the Menu icon and select Manage.
This resumes the status polling and data collection for the device. The status icon shows the current status of the device.

To Manage or Unmanage devices in bulk:
- Go to Inventory.
- Select the devices you wish to manage/unmanage.
- Click on the menu at the top right and select manage/unmanage devices.

You can also use the Quick Configuration Wizard (Settings → Configuration → Quick Configuration Wizard → Manage/Unmanage devices) to manage or unmanage devices in bulk.

You can also automate managing and unmanaging your devices in
OpManager. In case of a planned maintenance in your environment, network devices can be automatically moved into unmanaged state by
configuring a downtime scheduler. This will prevent
OpManager from spamming you with alerts and notifications on the devices that are down.