How can I decrypt Exchange communication traffic to analyze NTLM authentication steps?

You can decrypt Exchange TLS traffic by either configuring the Exchange server to export its certificate and disabling ECDH, or by setting the `SSLKEYLOGFILE` environment variable on the client. Then use Wireshark with the corresponding RSA keys or pre-master secret log to capture plaintext data. This method is detailed in the Penetration Techniques - Pass the Hash with Exchange Web Service article, which demonstrates how to observe NTLM Over HTTP exchanges.