Since we don't know what you've tried/how you've tried to do it, it's hard to know where things are going wrong. Start with Apple's instructions on how to setup an email account:
https://support.apple.com/HT201320
Common reasons for not succeeding when setting up a business email account:
1. Not knowing whether it is a Microsoft Exchange account
2. Not knowing the required settings (especially important if it is a Microsoft Exchange account)
This is why others have referred you to your company's IT department. If you don't have the settings, it's not likely you'll succeed. If you have a tech-savvy co-worker you can call, they may be able to help.