I stumbled across this error when attempting to perform a Pre-Update check on my vCenter server. “Update 7.0.0.10400 not found. Please provide a valid update version” and “Update 7.0.0.10600 not found. Please provide a valid update version” This is a potentially a bug with Release 7.0.0.10300 vCenter Build 16189094.
I decided to check the VAMI https://vCenter-URL:5480 and initiated the update to 7.0.0.10400. After the update completed, I was able to successfully perform the Pre-Update check for Release 7.0.0.10600.
I’ve confirmed this behaviour on two vCenter that are on Release 7.0.0.10300 vCenter Build 16189094, so my best guess is that this is a bug. I hope you found this useful. 🙂