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# Refresh the connection between server hardware and the appliance

If server hardware has lost connectivity or is not synchronized with the appliance, you need to refresh it. During normal operation, server hardware can lose connectivity with the appliance and become out of sync if you make changes to it through the iLO or OA. To prevent loss of connectivity, use the appliance to make changes to server hardware.

### Prerequisites

- Minimum required session ID privileges: Infrastructure administrator or Server administrator

Refreshing server hardware using REST APIs
`PUT /rest/server-hardware/`{id}`/refreshState`

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