The add-in can only be installed in Outlook 2016 or Outlook 2012. The “new” Outlook and Outlook on the web are not supported.
On this website, you can find all the essential information about the add-in and download the installation file.
Once the “OutlookFritzBoxAddin.msix” file has been downloaded, double-click on it to open the following dialog box (figure 5).
When you click any circled number in the picture below, the browser will scroll to the explanation of the numbered item. To return to the picture, click the back button of the browser.
Figure 5: Installation diakog
Once the add-in has been installed, close Outlook if it is already running and restart it. Then go to the contacts view. There you will see the “FritzBox Import-Export” menu with its commands in the classic or reduced ribbon.