This error generally occurs because Outlook is checking the local credential manager when attempting to log into the account, rather than checking the Exchange server.
When it does this, Outlook is attempting to check your email using your login details for the computer, rather than the login details for your Exchange email account.
You can fix this problem by following these steps:
											  Article ID: 251
											  Created On: Fri, Mar 13, 2015 at 11:45 AM
											  Last Updated On: Thu, Apr 23, 2015 at 11:42 AM
											  
											
Online URL: https://www.heartinternet.uk/support/article/why-do-i-get-the-message-the-name-cannot-be-matched-to-a-name-in-the-address-list-when-setting-up-my-exchange-mailbox-in-outlook.html