TelNet not working

If you’re trying to test connectivity between servers on a specific port and you go to use TelNet and receive a nasty little message that tells you that “telnet is not recognized as an internal or external command, operable program or batch file.”  run the following from your administrative command prompt

pkgmgr /iu:"TelnetClient"

Close the command prompt for good measure and try to use Telnet once more

Then if you want to uninstall Telnet, just replace /iu: with /uu:

pkgmgr /uu:"TelnetClient"