The authentication mechanism to be used when connecting to the Active Directory server.
Possible ValuesSIMPLE, DIGESTMD5, NEGOTIATE
By default, AuthMechanism is SIMPLE, and default plaintext authentication is used to log in to the server. If AuthMechanism is set to DIGESTMD5, the more secure DIGEST-MD5 authentication is used. If AuthMechanism is set to NEGOTIATE, NTLM/Negotiate authentication will be used.