Update Manager unknown baseline : vmware
VMware vSphere Update Manager had an unknown error. Check I was searching a solution in the internet and was not able to find a proper solution or suggestion for my error, that’s where I forced to write this article. Finally, we decided to create a new database for Update Manager and reinstall the Update Manager on the same server with the new database. Fix Windows Update errors - support.microsoft.com Jan 29, 2020
At this point you are unable to use Update Manager on this host, so will need to manually update the new secure keys. Download ESX350-201012410-BG . As you can see there’s a dependency patch called ESX350-201012404-BG .
Apr 24, 2017 vSphere: VUM (Update Manager) had an unknown error. C:\VMware\VMware Update Manager\Data The folder in particular is hostupdate and contains the metadata_##### file that the logs refer to. So if you still have the old server, you can simply copy it back over. Otherwise, your only recourse is to reinstall and clear the VUM database.
Remediate ESXi Hosts Via vSphere Update Manager Not
Jul 07, 2017 File upload failed: VMware Update Manager