Configurations for Microsoft Outlook

Open Microsoft Outlook.
Select Tools on the menu bar and Services in the menu.

Select your account in the list of Services and click on Properties.

Select the Servers tab.
If the input field Outgoing mail (SMTP) contains:
make sure that My server requires authentication is checked.
Click OK to save changes.

NOTE! If the input field Outgoing mail (SMTP) contains something
other than you don't have to make any configurations.

The configuration for use of "Auth before SMTP" is now completed.
Click OK to close the Services window.