# Define the OU path where your servers are located
$ouPath = "OU=servers,DC=domain,DC=local"  # Replace with your OU path

# Get a list of servers in the specified OU
$servers = Get-ADComputer -Filter {OperatingSystem -like "Windows Server*"} -SearchBase $ouPath | Select-Object -ExpandProperty Name

# Loop through each server and query logged-on users
foreach ($server in $servers) {
    try {
        # Use WMI to query logged-on user information
        $loggedOnUsers = Get-WmiObject -Class Win32_ComputerSystem -ComputerName $server | Select-Object -ExpandProperty UserName

        if ($loggedOnUsers) {
            Write-Host "Logged-on users on $server"
            $loggedOnUsers | ForEach-Object {
                Write-Host "  $_"
            }
        } else {
            Write-Host "No users logged on to $server"
        }
    } catch {
        Write-Host "Failed to query $server"
    }
}

If you want to search by specific names, you can adjust the filter to this –

Get-ADComputer -Filter {Name -like "AZ-EUW-*"} -SearchBase $ouPath