Telnet Client is a feature that is included with the Microsoft Operating Systems, but it is not enabled by default.
Telnet client is very much useful for troubleshooting mail flow & for doing port connectivity tests.
Let's see the various methods to install Telnet Client in Windows 2012:
Method 1: Install using GUI
=> OpenServer ManagerClick "Manage" => "Add Roles & Features".
=> Now keep clicking "Next" four times until we get "Select Features" page.
=> Select "Telnet Client" feature => then click "Next".
=> Click "Install".
Method 2: Install using Powershell
=> Launch the PowerShell window with elevated permissions (Run as Administrator)
=> TypeImport-Module servermanager& press enter
=> TypeAdd-WindowsFeature telnet-client
Method 3: Install using Command Prompt
=> Open command prompt using elevated permissions (Run as Administrator).
=> Type this command:dism /online /Enable-Feature /FeatureName:TelnetClient
=> Once the command completes successfully, telnet client will be installed.