office.com/setup – First, at the top of your Outlook ribbon, you need to select File option. After this, you should select Open & Export and then tap on Import/Export. Here, you will see the wizard starts. At this point, you will select Import from another program or file and then select Next option. Now, you should select Comma Separated Values and then tap on Next option. Then in the Import a File box, you have to browse your contacts file and then just double-click on it just to select it. The user should select one of the following, so that Outlook handles the duplicate contacts: Replace duplicates with items imported, Allow duplicates to be created and Do not import duplicate items. After this, tap on Next option. In the Select a destination folder box, you should scroll to the top and then choose the Contacts folder and tap on Next. At last, you need to tap on Finish and to view your contacts; you should select the People icon.
