Answer:
In the Internet Options, define the name of the proxy server and the port number.
Explanation:
If the two staff in the company are unable to reach the websites on the internet also they are able to access servers on the local area network also the Other staff members don't encounter the problem and they have to face the same problem because they do not define the name of the proxy server and the port number in the internet option.
If they do not define the proxy server and the post they have not accessing the website so to able the accessing it must properly define the proxy server and the port number.
