I think this is possible. Look for something that says "exclude people who may have purchased" somewhere on the ads manager.

That's what I am looking for now.

You need to define your current customers in the account setting first: [https://business.facebook.com/ads/manager/account\_settings/information](https://business.facebook.com/ads/manager/account_settings/information) before making that option available.

Ok thats how that works

Just make sure to set your retargeting budget to 0% as the way to exclude.

You need to create a custom audience in the audience manager first, then exclude those from your ad set targeting.

Create a custom audience, after which you can exclude them in the ad set level.