Which authentication methods are supported by Exchange Server?

The correct choice identifies the authentication methods supported by Exchange Server as Basic, NTLM, Digest, and OAuth.

Basic authentication allows users to provide their credentials (username and password) in a straightforward format. However, it transmits information in an encoded format rather than encrypted, which could be a security concern unless used with SSL/TLS protection.

NTLM (NT LAN Manager) is a challenge-response authentication protocol used in various Microsoft products. It provides a more secure login process by using a hashed form of the password for authentication, rather than sending the plaintext password.

Digest authentication enhances security by hashing the credentials and using nonces for each session, reducing the risk of replay attacks. It is particularly useful in environments where the data needs to be encrypted during transmission.

OAuth is a more modern authentication method that allows third-party applications to access users' information without exposing their passwords. It's widely used for integrations with cloud applications and provides more granular access control.

Overall, this combination of authentication methods ensures flexibility and security, making them appropriate for various deployment scenarios within Exchange Server.