Second NTLM Authorization Header

The NTLM protocol does not support sending multiple NTLM Authorization headers in a single request. NTLM is a challenge-response-based authentication protocol that involves multiple steps of negotiation between the client and the server.

When using NTLM authentication, the client and server exchange messages including an initial "Negotiate" message, followed by a "Challenge" message from the server, and finally an "Authenticate" message from the client.

Each message contains a single NTLM Authorization header, which includes the necessary information for the specific step of the authentication process.

Therefore, it is not possible to include multiple NTLM Authorization headers in a single HTTP request. If you have a specific requirement or use case that requires multiple NTLM Authorization headers, please provide more details, and I will be happy to assist you further.