This module here: https://www.odoo.com/apps/modules/9.0/base_partner_merge/ does deduplication if you don't have CRM installed, but I've installed CRM so presumably I don't need it. But I just can't find where it is. I'm a new user of Odoo and I'm evaluating the product for my employer so I'm obviously missing something but any help will be appreciated because our data currently comes from many sources and deduplication will be an important thing for us. 

To evaluate I'm currently using a self hosted 9.0 community edition instance. (The Debian install is a breeze btw)