There are several Outlook settings which need to be updated where to

1) Select the “File” tab at the top of your Outlook.


2) Click the “Account Settings” button and select the “Account Settings” option from the drop down.


3) Select your email account and click the “Change” button.


4) Update your email address and username by changing to When done, click the "More Settings" button


5) Change to on both the "General" tab as well as the "Outgoing Server" tab.