Is this part of Office 365? If so, I found this- To remove duplicate contacts in Office 365, the user can login to the OWA (Outlook Web Access) and then go to People → Contacts → Choose & Delete each replica contact manually.
try this. https://support.microsoft.com/en-us...look-com-435db2fb-555e-493b-8bd0-ae9c39a2a622 left hand side, 3rd from the top what looks somewhat like 2 people.
I'm not using the paid version but the free version of outlook.com. Hotmail uses outlook.com which I use plus I also use office outlook which is part of office 2003 which is on my computer. what I posted above works as I just deleted 3 contacts out of my contacts list.