Update-VMware-Tools-All-Win-VMs.ps1

#Author: A.J. Murray
#Created: 9/15/17
#Updated: 12/1/2018

#Get the name of the vCenter Server
$vcenter = Read-Host "Enter the FQDN or IP of your vCenter Server"

#Get credentials for logging into vCenter
$credential = Get-Credential
$Username = $credential.GetNetworkCredential().username
$Password = $credential.GetNetworkCredential().password

#Connect to the vCenter Server - Assuming the script is running under credentials that can connect
Connect-VIServer $vcenter -User $Username -Password $Password

#Get a list of the virtualmachines that are Powered On
$virtualmachines = Get-VM | Where-Object PowerState -eq "PoweredOn" | Select-Object -ExpandProperty Name

#Get Only the Windows VMs
ForEach ($vm in $virtualmachines)
{
#If the VM is a Windows VM...
    If (Get-VMGuest $vm | where-object OSFullName -like "Microsoft*")
    {
        #Update VMware Tools but don't reboot the machine - Reboot may still occur depending on ESXi/vCenter version
        Write-Host "Updating VMware tools on $vm"
        Update-Tools $vm -NoReboot 
    }
#If there is no OSFullName detected
elseif(Get-VMGuest $vm | Where-Object OSFullName -Like " *")
    {
        Write-Host "VMware Tools doesn't appear to be installed on $vm"
    }
#If it's not a Windows VM then automatic update is not supported
else {
    Write-Host "$vm is not a Windows VM and automatic Update is not supported"
    }
}

#Cleanly Disconnect from vCenter
Disconnect-VIServer -Server $vcenter -Confirm:$false