The Mac Mail app should automatically detect the proper Outlook.com email server settings and not require any additional information, but if you do need to provide mail servers, or if you’re using a different mail client aside from Mail app, you may find the below information to be useful and relevant to you. Add or remove email accounts in Mail on Mac. Use the Mail app to send, receive, and manage email for all of your email accounts in one location. Simply add the accounts—such as iCloud, Exchange, Google, school, work, or other—you want to use in Mail. Knoppix download mirror.
From the menu bar in Mail, choose Mail > Add Account.
Select your email provider from the list, then click Continue.
Some accounts, such as Google, might ask that you click Open Browser to complete authentication in your web browser.
Follow the onscreen instructions to enter account details, such as your name, email address, and password. If you're not sure what information to enter, please contact your email provider for help.
Use the Inbox for each account
The Inbox gathers together the messages for every email account you added. If you added more than one account, you can click the disclosure triangle next to Inbox in the sidebar, then select a mailbox to see only the messages for that account.
Choose Apple menu > System Preferences, then click Internet Accounts.
Select your account in the sidebar.
Select the features you want to use with your account.
Add Apple Mail To Outlook
Is your company exchange server running Exchange Server 2007 with service pack 2 rollup 4 or newer? I believe that that is what I read somewhere were the minimum requirements for OWA server in order for SL to be compatible with it. Also, and I could never figure out why, but when I set it up on my work laptop, I had to do it inside our corporate firewall. And I presume that for account type, you have chosen Exchange 2007 not Exchange IMAP? The only other thing that I could suggest is to doublecheck the server name with your I.T. Dept.