If I try to add an SNMP sensor for the server on PRTG, I get this error:
The sensor could not find any matching data on the monitored device. To resolve this issue, check if SNMP is enabled on the device. Also check if the Dell OpenManage Server Administrator is correctly installed on the target server. Or check if the needed OIDs can be reached. For more information, see https://kb.paessler.com/en/topic/68040. (code: PE187)
The error message implies that the required OIDs for this sensor are not available. Enabling SNMP on recent Windows versions can be tricky as there are plans to deprecate it for years already. While it is still possible, it became more difficult and hidden over time. Please check this how-to in case you missed something:
How to enable SNMP on your operating system
Disclaimer:
The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.