To deploy VMware Tools 10 in your environment, the procedure differs from previous release because since September 2015 new versions are released as separate package outside the ESXi updates.
Despite the big benefit of having new features available without waiting for new ESXi updates, raise a problem of how to deploy new VMware Tools to all the virtual machines of the network and how to keep them up-to-date.
Keep VM Tools up-to-date
If your environment has different hosts versions, each ESXi will have a different VM Tools version stored in its local repository (by default /locker/packages/<version>).
If a virtual machine is hosted on a ESXi 5.5, for instance, and the VM Tools are updated to that release, moving the VM to a different host (i.e. ESXi 5.5 upd3) it will show the message:
VMware Tools is outdated on this virtual machine
To deploy new VM Tools releases and to get rid of the warning message, you should create a shared repository reachable by all your ESXi hosts, save latest VM Tools that are always compatible back to all previous versions and then perform the update as you normally do after each ESXi upgrade.
To achieve this goal, for each host of your network you need to modify the UserVars.ProductLockerLocation item that identifies the VMware Tools directory. By default this directory is present on each ESXi host and can be modified to point to a shared datastore. Changing the UserVars.ProductLockerLocation value you can centralize the VM Tools deployment.
Get latest release
From VMware website download latest release of VMware Tools.
Select the needed package then click Download.
Unzipping the downloaded .zip package, the two folders extracted contain the files used to install and update VMware Tools:
Create a shared datastore
From VMware vSphere Client, go to Home > Inventory > Datastore and Datastores Clusters and select the storage on which you want to create a shared folder. Go to Summary tab and click Browse Datastore.
Click on the Create a new folder icon and enter a folder name (i.e. upd_vmtools). Click OK to create the folder.
The new folder is created in the selected storage. Select Upload icon > Upload Folder to save the VMware Tools to the storage.
Select the folders to upload (floppies, vmtools) then click OK.
The folders have been uploaded successfully.
From the vSphere Web Client, connect the ESXi and go to Manage > Settings > Advanced System Settings and select the UserVars.ProductLockerLocation option. Click Edit to modify the path.