web.config

 $($ExchangeInstallPath)FrontEnd\HttpProxy\ews\web.config"

$($ExchangeInstallPath)FrontEnd\HttpProxy\Sync\web.config"

$($ExchangeInstallPath)\Bin\EdgeTransport.exe.config"

"$($ExchangeInstallPath)ClientAccess\exchweb\ews\web.config"

"$($ExchangeInstallPath)ClientAccess\Sync\web.config"

$($ExchangeInstallPath)ClientAccess\ecp\web.config"