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Automate PowerCLI connection to vCenter
# Automated PowerCLI connections to vCenter Server
# Script will use stored PSCredentials if user is unprivileged
function AutoConnect-VIServer () {
[string]$server = 'vcenter'
# Check if user is in a group with vCenter permissions
if ([System.Security.Principal.WindowsIdentity]::GetCurrent().Groups.Translate(
[System.Security.Principal.NTAccount]) -contains 'DOMAIN\vCenter_Admins') {
# Connect to vCenter using existing user token
[void](Connect-VIServer (Resolve-DnsName $server).Name)
else {
# PSCredentials are unique per (user,machine) pair, so the filename changes too
$filePath = $env:APPDATA + '\' + ((
) | ForEach-Object { $_.tostring('x2') }
).toupper() -join '')
if (!(Test-Path $filePath)) {
# Save PSCredential to file if it doesn't exist
$cred = Get-Credential -Message 'Enter credentials for VMWare Admin:'
$cred.UserName, ($cred.Password | ConvertFrom-SecureString) -join ',' |
Out-File $filePath
if (!$cred) {
# Load PSCredential from file
$user, $pass = (Get-Content $filePath).Split(',')
$cred = [System.Management.Automation.PSCredential]::new(
$user, (ConvertTo-SecureString $pass)
# Connect to vCenter using stored PSCredential
[void](Connect-VIServer (Resolve-DnsName $server).Name -Credential $cred)
$filePath, $user, $pass, $cred = $null
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