> For the complete documentation index, see [llms.txt](https://www.pinvoke.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.pinvoke.dev/secur32/lsalookupauthenticationpackage.md).

# LsaLookupAuthenticationPackage

```csharp
[DllImport("SECUR32.dll", ExactSpelling = true)]
[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
public static extern unsafe NTSTATUS LsaLookupAuthenticationPackage(
    HANDLE LsaHandle,
    LSA_STRING* PackageName,
    uint* AuthenticationPackage);
```

[LSA\_STRING](/authentication/lsa_string.md)