$strScriptUser = "FULL-RIGHTS ADMIN ACCOUNT"
$strPass = "PROBABLY PASSWORD123"
$PSS = ConvertTo-SecureString $strPass -AsPlainText -Force
$cred = new-object system.management.automation.PSCredential $strScriptUser,$PSS
$Now = Get-Date -Format g
$title = 'Restarting T1 Service'
$msg   = 'Please enter reason for restarting T1'
$text = [Microsoft.VisualBasic.Interaction]::InputBox($msg, $title)
$Log = $env:username + ", " + $env:computername + ", " + $Now + ", " + $text

Invoke-Command -ComputerName "SYDSRV02" -scriptblock {
Stop-Service -name "Test Service"
Start-Sleep -s 25
Start-Service -name "Test Service"
} -Credential $cred
Add-Content -Path \\Server\Path\Report.txt $Log