What tool must be used to update the firmware for multiple HPE ProLiant MicroServer Gen10 Plus servers?

To update the firmware for multiple HPE ProLiant MicroServer Gen10 Plus servers, the correct tool to use is HPE iLO 5. This capability is essential as iLO (Integrated Lights-Out) provides a powerful management tool for remote management of HPE servers, enabling firmware updates across multiple devices efficiently.

iLO 5 allows administrators to perform various functions including remote server management, monitoring, and configuration. One of its significant features is the ability to update firmware, as it facilitates batch updates for multiple servers either through the Web GUI or through scripting and automation tools. By using iLO 5, system administrators can ensure that all servers are running the latest firmware, improving security and performance across the server fleet.

The other options, while they might serve various management or monitoring purposes, do not specifically cater to the bulk firmware update functionalities necessary in this context.