GPO tool

Group Policy made searchable

A free ADMX browser or comparison tool for IT administrators.Search policies, find registry keys, and see exactly what each setting writes to the Windows Registry. Or compare two GPO backups to see exactly what has changed between them.

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Allow delegating default credentials with NTLM-only server authentication

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 default credentials can be delegated (default credentials are those that you use when first logging on to Windows).

If you disable or do not configure (by default) this policy setting, delegation of default credentials is not permitted to any machine.

Note: The "Allow delegating default 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 Information

VendorMicrosoft
ProductCred Ssp
CategoryCredentials Delegation
Applies toComputer Configuration
Supported onWindows Vista
Registry Key[HKLM]SoftwarePoliciesMicrosoftWindowsCredentialsDelegation
Value NameAllowDefCredentialsWhenNTLMOnly
TypeREG_DWORD
Enabled value1
Disabled value0

Policy Settings

Add servers to the list:

Registry Key[HKLM]SoftwarePoliciesMicrosoftWindowsCredentialsDelegationAllowDefCredentialsWhenNTLMOnly
Value NameAllowDefCredentialsWhenNTLMOnly_Name
TypeREG_SZ

Concatenate OS defaults with input above

Registry Key[HKLM]SoftwarePoliciesMicrosoftWindowsCredentialsDelegation
Value NameConcatenateDefaults_AllowDefNTLMOnly
TypeREG_DWORD
Defaultfalse