Hello,
There seems to be a few threads regarding this topic. I haven't been able to get a solid answer of "Yes, you can and this is how..." or "No, you can't" by following these threads.
So, can we use update manager today to upgrade the guests tool?
Thanks,
Daniel
taken from the VMware vCenter Update Manager Administration Guide
Update Manager allows you to upgrade ESX/ESXi hosts, virtual appliances, VMware Tools, and the virtual hardware of virtual machines to a newer version, with the option of rolling back the upgrade if it fails. You can also set up custom preupgrade and postupgrade scripts to run before and after an upgrade. Upgrades for ESX and ESXi hosts, virtual machines, and virtual appliances are managed through baselines and baseline groups
taken from the VMware vCenter Update Manager Administration Guide
Update Manager allows you to upgrade ESX/ESXi hosts, virtual appliances, VMware Tools, and the virtual hardware of virtual machines to a newer version, with the option of rolling back the upgrade if it fails. You can also set up custom preupgrade and postupgrade scripts to run before and after an upgrade. Upgrades for ESX and ESXi hosts, virtual machines, and virtual appliances are managed through baselines and baseline groups
Thank you Troy - Looks like this will only work for vSphere.