To export the contacts from an Outlook contacts folder, proceed as follows:

• • Open Outlook.
     
  • Click on the "File" button in the app bar.
     
  • Click on the "Open & Export" button in the vertical selection bar.
     
  • Select the "Export to a file" action from the Import/Export wizard. Then click "Next."
     
  • Select the "Comma Separated Values" option. Then click "Next."
     
  • In the folder hierarchy shown, select the "Contacts" folder below the desired account folder. Then click "Next."
     
  • Select the CSV file to which the Outlook contacts will be exported. Then click "Next."
     
  • Click "Finish."
     
  • Now you can import the output file into the FritzBox as described here.