Step1:Open Outlook.
Step2:Choose the File tab in the ribbon.
Step3:Choose Account Settings, then select Account Settings from the menu.
Step4:Select the Email tab.
Step5:Make sure the correct account is highlighted, then choose Change.
Step6:Choose More Settings > Advanced > Add.
Step7:Type the shared email address, such as info@contoso.com.
Step8:Choose OK > OK.
Step9:Choose Next > Finish > Close.