How to Use Multi NET-SEND for Network Messaging In the era of modern collaboration tools, system administrators often need lightweight, command-line alternatives for instant network communication. While the classic Windows NET SEND command was deprecated after Windows XP, multi-network sending utilities and updated PowerShell methods have taken its place. This guide covers how to send messages to multiple computers simultaneously using native Windows tools and modern equivalents. Understanding the Modern Equivalents
The original net send command relied on the Messenger service, which was removed due to security vulnerabilities. Today, administrators use msg.exe or PowerShell to achieve the same result. These modern alternatives allow you to broadcast alerts, maintenance notices, or urgent messages across a Local Area Network (LAN) without installing heavy third-party software. Prerequisites for Network Messaging
Before sending messages across your network, ensure your environment meets these requirements:
Registry Verification: The Remote Desktop Services messaging functionality must be enabled.
Administrative Rights: You need an administrator account on the sending machine.
Network Visibility: Target computers must be on the same domain or local network.
Firewall Rules: Port 445 (SMB) and RPC ports must be open on target machines to allow incoming messages. Method 1: Using the MSG Command for Multiple Users
The msg command is the direct native successor to NET SEND. It allows you to target specific users, sessions, or every machine on the network.
To send a message to a specific user across the network, use this syntax:msg /server:ComputerName Username “Your message here”
To send a message to every user logged into a specific machine, use an asterisk:msg /server:ComputerName”The server will reboot in 10 minutes.”
To send a message to every single machine in your current domain, use the asterisk twice:msg * /time:30 “Maintenance window starting now.”
The /time:30 switch dictates how many seconds the message stays on the target screen before automatically closing. Method 2: Automating Multi-Send via Batch Scripts
If you need to target a specific list of computers rather than the entire domain, a simple batch script is the most efficient approach.
First, create a text file named computers.txt and list your target computer names or IP addresses, with one entry per line: PC-FINANCE01 PC-HR02 192.168.1.50 Use code with caution.
Next, create a batch file named multisend.bat in the same folder with the following code:
@echo off set /p msg=“Enter your broadcast message: ” for /f %%i in (computers.txt) do ( echo Sending to %%i… msg /server:%%i * “%msg%” ) pause Use code with caution.
Running this script prompts you for a message and automatically loops through your list to deliver it to every active machine. Method 3: Scaling Up with PowerShell
For advanced environments, PowerShell offers superior error handling and speed. You can leverage the Invoke-WmiMethod or standard execution loops to send messages instantly.
Open PowerShell as an Administrator and run the following script to target multiple machines: powershell
\(Computers = Get-Content -Path ".\computers.txt" \)Message = “Urgent: Please save your work. Network maintenance begins in 5 minutes.” foreach (\(Computer in \)Computers) { try { msg /server:\(Computer * \)Message Write-Host “Successfully sent to \(Computer" -ForegroundColor Green } catch { Write-Host "Failed to send to \)Computer” -ForegroundColor Red } } Use code with caution. Troubleshooting Common Errors
If your multi-send commands fail, check these two common culprits:
Error: “Error 5 getting session names” or Access DeniedThis occurs when the target machine blocks remote RPC traffic. To fix this, open the registry editor on the target machine, navigate to HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server, and change the value of AllowRemoteRPC to 1.
Error: “Computer Name not found”The sending machine cannot resolve the hostname. Try using the target machine’s static IP address instead of its computer name in your list.
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