Each email I receive, Outlook is adding the sender to my address book. I don't want this but cannot find where the setting is to turn this off. Appreciate any help... Thx

Each email I receive, Outlook is adding the sender to my address book. I dont want this but cannot find where the setting is to turn this off. Appreciate any help....Thx
Never mind... I found it... it was in an "add-in" called "You Perform". Thx anyway