I have around 20 Windows 2016 Server VMs running on vSphere 6.7. I've upgraded all of the hosts to the latest build (15160138). I'm in the process of upgrading VMware Tools from version 10.3 to 11. Most of the VMs are upgrading without a problem, but a few of them are not upgrading or giving me an error message. On each of these, the upgrade starts and then shows a status of Completed in about 5 seconds, but the version still shows 10.3 and the "Upgrade Available" message is still displayed. The host itself doesn't seem to be the problem because one host has a VM that upgraded and another that won't.
Any ideas?