An authentication has three primary mechanisms. One is the Basic Authentication. An advantage or benefit that one can have in a basic authentication is getting a wide support from the browser. Another benefit one enjoys through basic authentication is having able to access all Exchange resources regardless of their location. However, the negative aspect of which is that a basic authentication is somewhat insecure. At the same time it can also pass on user names and passwords into the Internet in a hardly noticeable way. If somebody is engaged in packet sniffing or like watching the packets through the Net, there is a possibility that he will capture a username or a password without any intentions.