In my recent attempt to automate and get a better handle of some of the HPE servers in our fleet, I tried to use the HP SUM function of the SPP server remotely. If you're trying to patch a VMware host, especially a Gen10, you will need to make sure you download and configure the iSUT component on those servers from HP. I'll link to the two sites that I used to get a better handle of the steps necessary to proceed with the updates.
From my research, it appears that the new VMware images from HPE already come with iSUT preloaded so if using a recent image, this might not be a requirements. If you're looking for the download links, you can find them for vSphere 6.5 and vSphere 6.7 here:
Nov 23, 2020 Edit - Found the github page from HPE for the iLO RESTful interface that contains a ton of good information. https://hewlettpackard.github.io/python-redfish-utility/
sut –set mode=AutoDeploy