Deleting a contact:
You can delete details of any contacts you have added to your personal contact list (My Contacts). This includes contacts you have created and those you have added from the Directory. You cannot delete a contact from the Directory itself (only Local Operational Administrators can do this). So deleting a directory contact in your personal contacts will not delete the Directory entry
Click People in the navigation bar at the top right of the screen
Enter the name of the contact you want to delete in the search bar at the top of the screen and click the magnifying glass icon or find and select the name by scrolling
Select the contact, click the three dots on the right side of the screen and select delete
Confirm that you would like to delete the contact and they will be taken out of your contact list
Retrieving a deleted contact
Click Mail in the navigation bar at the top right of the screen
Click Deleted Items on the left side of the screen and select the contact you want to recover
Select Move to Contacts on the right side of the screen and the contact will be moved back in to your contact list