I think we shouldn't jump to conclusions without knowing all the details about the OP's mail server configuration. If his company uses MS Cloud for managing emails, then most likely he will be able to access it by going to outlook.com and entering his work email and password. If his company uses internal exchange server, then outlook.com won't do. Most companies do have OWA but without knowing the address, it's impossible to guess how to access it. And then, of course, there is most often VPN that you need to go through even to access web-based email.