Last updated February 2, 2018
Skype contacts that have been deleted in Skype still appear in your People contacts list.
Note: You can only delete Skype contacts from within Skype. Read more about how to Create or edit, delete, or restore contacts or contact lists in Outlook.com.
This issue is fixed in the Outlook.com beta. Learn more about the Outlook.com beta.
Learn how to manage contacts in Skype