Policy
Allow delegating fresh credentials with NTLM-only server authentication
Microsoft Windows
Policy overview
Key metadata and intent for this policy.
Supported OS tags: Windows10, Windows10RT, Windows11, Windows7, Windows8, Windows81, WindowsRT, WindowsRT81, WindowsServer2008, WindowsServer2012, WindowsServer2012R2, WindowsServer2016, WindowsVista
This policy setting applies to applications using the Cred SSP component (for example: Remote Desktop Connection). This policy setting applies when server authentication was achieved via NTLM. If you enable this policy setting, you can specify the servers to which the user's fresh credentials can be delegated (fresh credentials are those that you are prompted for when executing the application). If you do not configure (by default) this policy setting, after proper mutual authentication, delegation of fresh credentials is permitted to Remote Desktop Session Host running on any machine (TERMSRV/*). If you disable this policy setting, delegation of fresh credentials is not permitted to any machine. Note: The "Allow delegating fresh credentials with NTLM-only server authentication" policy setting can be set to one or more Service Principal Names (SPNs). The SPN represents the target server to which the user credentials can be delegated. The use of a single wildcard character is permitted when specifying the SPN. For Example: TERMSRV/host.humanresources.fabrikam.com Remote Desktop Session Host running on host.humanresources.fabrikam.com machine TERMSRV/* Remote Desktop Session Host running on all machines. TERMSRV/*.humanresources.fabrikam.com Remote Desktop Session Host running on all machines in humanresources.fabrikam.com
Registry values
How enabled and disabled states update the registry.
| Scope | Registry location | Type | Enabled value | Disabled value | Copy |
|---|---|---|---|---|---|
| Computer | Path Software\Policies\Microsoft\Windows\CredentialsDelegation Value name AllowFreshCredentialsWhenNTLMOnly | REG_DWORD | HKLM 1 | HKLM 0 |
Policy elements
Inputs and configuration options exposed by this policy.
| Scope | Element | Type | Registry mapping | Constraints & behavior | Copy |
|---|---|---|---|---|---|
| Computer | Concatenate OS defaults with input above ID ConcatenateDefaults_AFCN | boolean | Path Software\Policies\Microsoft\Windows\CredentialsDelegation Value name ConcatenateDefaults_AllowFreshNTLMOnly Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 | |
| Computer | Add servers to the list: ID AllowFreshCredentialsWhenNTLMOnly_Name | list | Path Software\Policies\Microsoft\Windows\CredentialsDelegation\AllowFreshCredentialsWhenNTLMOnly Value name AllowFreshCredentialsWhenNTLMOnly Type REG_MULTI_SZ | List: additive |