DISM /online /enable-feature /featurename:TelnetClient

It's always frustrating when new server images don't have the TelnetClient installed.

 I usually use Package Manager to install, http://www.lifeasbob.com/2015/08/01/InstallingTelnetClientOnWindows.aspx , but lately that has not always worked. 

I found a new way here: 

http://blogs.technet.com/b/joscon/archive/2010/08/26/adding-features-with-dism.aspx 

DISM /online /enable-feature /featurename:<name of feature>

Note: The featurename syntax is case sensitive so make sure you're typing it out as it appears in the list below.

http://blogs.technet.com/b/joscon/archive/2010/08/26/adding-features-with-dism.aspx

The following is the feature list for Windows 2008 R2 SP1:

Features listing for package : Microsoft-Windows-Foundation-Package~31bf3856ad364e35~amd64~~6.1.7601.17514

----------------------------------------------------------- | --------
Feature Name                                                | State  
----------------------------------------------------------- | --------
DirectoryServices-DomainController-Tools                    | Disabled
IIS-WebServerRole                                           | Enabled
IIS-WebServer                                               | Enabled
IIS-CommonHttpFeatures                                      | Enabled
IIS-HttpErrors                                              | Disabled
IIS-HttpRedirect                                            | Disabled
IIS-ApplicationDevelopment                                  | Enabled
IIS-Security                                                | Enabled
IIS-URLAuthorization                                        | Disabled
IIS-RequestFiltering                                        | Enabled
IIS-NetFxExtensibility                                      | Enabled
IIS-HealthAndDiagnostics                                    | Enabled
IIS-HttpLogging                                             | Disabled
IIS-LoggingLibraries                                        | Disabled
IIS-RequestMonitor                                          | Disabled
IIS-HttpTracing                                             | Disabled
IIS-IPSecurity                                              | Disabled
IIS-Performance                                             | Enabled
IIS-HttpCompressionDynamic                                  | Disabled
IIS-WebServerManagementTools                                | Enabled
IIS-ManagementScriptingTools                                | Disabled
IIS-IIS6ManagementCompatibility                             | Disabled
IIS-Metabase                                                | Disabled
WAS-WindowsActivationService                                | Enabled
WAS-ProcessModel                                            | Enabled
WAS-NetFxEnvironment                                        | Enabled
WAS-ConfigurationAPI                                        | Enabled
IIS-HostableWebCore                                         | Disabled
IIS-ISAPIExtensions                                         | Disabled
IIS-ISAPIFilter                                             | Disabled
IIS-StaticContent                                           | Disabled
IIS-DefaultDocument                                         | Disabled
IIS-DirectoryBrowsing                                       | Disabled
IIS-WebDAV                                                  | Disabled
IIS-ASPNET                                                  | Disabled
IIS-ASP                                                     | Disabled
IIS-CGI                                                     | Disabled
IIS-ServerSideIncludes                                      | Disabled
IIS-CustomLogging                                           | Disabled
IIS-BasicAuthentication                                     | Disabled
IIS-HttpCompressionStatic                                   | Disabled
IIS-ManagementConsole                                       | Disabled
IIS-ManagementService                                       | Disabled
IIS-WMICompatibility                                        | Disabled
IIS-LegacyScripts                                           | Disabled
IIS-LegacySnapIn                                            | Disabled
IIS-FTPServer                                               | Disabled
IIS-FTPSvc                                                  | Disabled
IIS-FTPExtensibility                                        | Disabled
Smtpsvc-Admin-Update-Name                                   | Disabled
Smtpsvc-Service-Update-Name                                 | Disabled
NetFx3                                                      | Enabled
WCF-HTTP-Activation                                         | Enabled
WCF-NonHTTP-Activation                                      | Enabled
DirectoryServices-DomainController                          | Disabled
DirectoryServices-ADAM                                      | Disabled
OEMHelpCustomization                                        | Disabled
CorporationHelpCustomization                                | Disabled
Printing-LPRPortMonitor                                     | Disabled
Printing-InternetPrinting-Client                            | Disabled
Printing-AdminTools-Collection                              | Disabled
BitLocker                                                   | Disabled
BitLocker-RemoteAdminTool                                   | Disabled
BdeAducExtTool                                              | Disabled
SimpleTCP                                                   | Disabled
SNMP                                                        | Disabled
WMISnmpProvider                                             | Disabled
Microsoft-Windows-Web-Services-for-Management-IIS-Extension | Disabled
LightweightServer                                           | Disabled
MicrosoftWindowsPowerShellISE                               | Disabled
RemoteAssistance                                            | Disabled
WSRM                                                        | Disabled
TelnetServer                                                | Disabled
TelnetClient                                                | Disabled
BiometricFramework                                          | Disabled
IIS-WindowsAuthentication                                   | Disabled
IIS-DigestAuthentication                                    | Disabled
IIS-ClientCertificateMappingAuthentication                  | Disabled
IIS-IISCertificateMappingAuthentication                     | Disabled
IIS-ODBCLogging                                             | Disabled
Printing-Server-Role                                        | Disabled
Printing-LPDPrintService                                    | Disabled
BusScan-ScanServer                                          | Disabled
Printing-InternetPrinting-Server                            | Disabled
FaxServiceConfigRole                                        | Disabled
FaxServiceRole                                              | Disabled
DFSR-Infrastructure-ServerEdition                           | Disabled
DHCPServer                                                  | Disabled
DHCPServer-Tools                                            | Disabled
DHCPServer-RSATClient-Tools                                 | Disabled
NetworkLoadBalancingFullServer                              | Disabled
FailoverCluster-FullServer                                  | Disabled
NetworkLoadBalancingManagementClient                        | Disabled
FailoverCluster-AdminPak                                    | Disabled
InkSupport                                                  | Enabled
DesktopExperience                                           | Enabled
MediaPlayback                                               | Enabled
WindowsMediaPlayer                                          | Enabled
HandwritingRecognition                                      | Disabled
AppServer                                                   | Disabled
AppServer-UI                                                | Disabled
Licensing                                                   | Disabled
Licensing-UI                                                | Disabled
SessionDirectory                                            | Disabled
SBMgr-UI                                                    | Disabled
WebAccess                                                   | Disabled
SUA                                                         | Disabled
Microsoft-Windows-Deployment-Services                       | Disabled
Microsoft-Windows-Deployment-Services-Transport-Server      | Disabled
Microsoft-Windows-Deployment-Services-Deployment-Server     | Disabled
Microsoft-Windows-Deployment-Services-Legacy-SIS            | Disabled
Microsoft-Windows-Deployment-Services-Admin-Pack            | Disabled
ActiveDirectory-PowerShell                                  | Disabled
DirectoryServices-AdministrativeCenter                      | Disabled
DNS-Server-Full-Role                                        | Disabled
DirectoryServices-ADAM-Tools                                | Disabled
DNS-Server-Tools                                            | Disabled
WINSRuntime                                                 | Disabled
Microsoft-Windows-Internet-Naming-Service-AdminTools        | Disabled
IAS NT Service                                              | Disabled
HCSRuntime                                                  | Disabled
HCSUI                                                       | Disabled
RPC-HTTP_Proxy                                              | Disabled
Gateway                                                     | Disabled
Gateway-UI                                                  | Disabled
NPSManagementTools                                          | Disabled
HCAP-Server                                                 | Disabled
RasServer                                                   | Disabled
RasServerAdminTools                                         | Disabled
RasServerAll                                                | Disabled
RasRoutingProtocols                                         | Disabled
RasCMAK                                                     | Disabled
AdminUI                                                     | Disabled
NIS                                                         | Disabled
RSAT-NIS                                                    | Disabled
PSync                                                       | Disabled
WirelessNetworking                                          | Disabled
WindowsRecoveryDisc                                         | Disabled
WindowsServerBackup                                         | Disabled
WindowsServerBackupCommandlet                               | Disabled
ServicesForNFS-ServerAndClient                              | Disabled
ServerForNFS-Infrastructure                                 | Disabled
ClientForNFS-Infrastructure                                 | Disabled
NFS-Administration                                          | Disabled
DFS-Replication-All                                         | Disabled
DfsMgmt                                                     | Disabled
FSRM-Infrastructure                                         | Disabled
FSRM-Management                                             | Disabled
CoreFileServer                                              | Disabled
BITSExtensions-Upload                                       | Disabled
BITSExtensions-AdminPack                                    | Disabled
MSRDC-Infrastructure                                        | Disabled
FRS-Infrastructure                                          | Disabled
StorageManagerForSANs                                       | Disabled
Indexing-Service-Package                                    | Disabled
iSNS_Service                                                | Disabled
Microsoft-Windows-GroupPolicy-ServerAdminTools-Update       | Disabled
TFTP                                                        | Disabled
MultipathIo                                                 | Disabled
DirectoryServices-ISM-Smtp                                  | Disabled
SearchEngine-Server-Package                                 | Enabled
CertificateServicesManagementTools                          | Disabled
CertificateServices                                         | Disabled
OnlineRevocationServicesManagementTools                     | Disabled
OnlineRevocationServices                                    | Disabled
WebEnrollmentServices                                       | Disabled
NetworkDeviceEnrollmentServices                             | Disabled
CertificateEnrollmentPolicyServer                           | Disabled
CertificateEnrollmentServer                                 | Disabled
P2P-PnrpOnly                                                | Disabled
MSMQ-Server                                                 | Disabled
MSMQ-Triggers                                               | Disabled
MSMQ-ADIntegration                                          | Disabled
MSMQ-HTTP                                                   | Disabled
MSMQ-Multicast                                              | Disabled
MSMQ-DCOMProxy                                              | Disabled
MSMQ-RoutingServer                                          | Disabled
Printing-XPSServices-Features                               | Enabled
DFSN-Server                                                 | Disabled
ADFS-FederationService                                      | Disabled
ADFS-FederationServiceProxy                                 | Disabled
ADFS-WebAgentClaims                                         | Disabled
ADFS-WebAgentToken                                          | Disabled
RightsManagementServices                                    | Disabled
RMS-Federation                                              | Disabled
RightsManagementServices-AdminTools                         | Disabled
QWAVE                                                       | Disabled
PeerDist                                                    | Disabled
SIS-Limited                                                 | Disabled
Microsoft-Hyper-V                                           | Enabled
VmHostAgent                                                 | Disabled
Microsoft-Hyper-V-Management-Clients                        | Enabled
DamgmtTools                                                 | Disabled
Internet-Explorer-Optional-amd64                            | Enabled
SMBHashGeneration                                           | Disabled
ServerMigration                                             | Disabled
Xps-Foundation-Xps-Viewer                                   | Disabled
TIFFIFilter                                                 | Disabled
Microsoft-Windows-RemoteFX-Host-Package                     | Disabled
Microsoft-Windows-RemoteFX-EmbeddedVideoCap-Setup-Package   | Disabled