Find out a server with Azure AD Connect

You can check the Azure AD Connect install or sync service by follow PS:

Checked install

$servers = "Server1", "Server2", "Server3" # Replace with your server names
foreach ($server in $servers) {
    $installedPrograms = Get-WmiObject -Class Win32_Product -ComputerName $server | Where-Object { $_.Name -like "*Azure AD Connect*" }
    if ($installedPrograms) {
        Write-Output "$server: Azure AD Connect is installed."
    } else {
        Write-Output "$server: Azure AD Connect is not installed."
    }
}

Check Sync service

$servers = "Server1", "Server2", "Server3" # Replace with your server names
foreach ($server in $servers) {
    $service = Get-Service -ComputerName $server -Name "ADSync" -ErrorAction SilentlyContinue
    if ($service) {
        Write-Output "$server: Azure AD Connect Sync service is running."
    } else {
        Write-Output "$server: Azure AD Connect Sync service is not found."
    }
}