Issue with adding exchange account to MacBook Pro

Typically, you would use the Microsoft Exchange option when configuring your Exchange account in the Mail app. At the point you are asked to enter your Email Address, you would normally just enter your full (including domain name) account name ... like JohnDoe@<your company's domain name>

In theory, if there is an autodiscover record for your company's domain name, the server settings would be filled in automatically.

Ref: What Is An Autodiscover Record And Why Do I Need It? - Intermedia

When that doesn't happen, for whatever reason, you should be prompted to type in the additional server information manually. That prompt should include the options to enter your Email Address, User Name, Password, & both the internal & external URLs for the company exchange servers.

It appears the best solution going forward is to work with your company's IT staff for assistance with getting this set up on your Mac.

I haven't tried this is a while, but see if either of the following two options work for you:

Option #1

• Run the Mail app.
• From the app's menu bar, select: Mail > Preferences > Accounts
• Create a new email account by clicking on the "+" button.
• Choose "Other Mail Account…"
• At the first screen enter your name, email address, and password.
• BEFORE clicking on Sign In, hold down the Option key, and then, click on Sign In.
• You will now have the opportunity to enter both the account type (POP or IMAP) and the Incoming (POP or IMAP) and Outgoing (SMTP) servers used by your email provider. 

Option #2

• Run the Mail app.
• Start by adding a new account in the Mail app, i.e., Mail > Preferences > Account > "+"
• Select Other Mail Account…
• Enter a bogus email address and password, and then, click on Continue.
• You should now see a window, where you can enter the correct information and you can select the Account Type of POP or IMAP.