Alternative to countuniqueif in dax?

[ShayCowin]

My issue you is I have a data table with information saying did a customer buy a product in their first appointment yes it no, the issue is if they buy multiple products it's on multiple lines. I was able to do count unique and base it around customer Id but I can't seem to get round it. 

(First week of BI)

[Greg_Deckler]

@ShayCowin Sorry, having trouble following, can you post sample data as text and expected output?
Not really enough information to go on, please first check if your issue is a common issue listed here: https://community.powerbi.com/t5/Community-Blog/Before-You-Post-Read-This/ba-p/1116882

Also, please see this post regarding How to Get Your Question Answered Quickly: https://community.powerbi.com/t5/Community-Blog/How-to-Get-Your-Question-Answered-Quickly/ba-p/38490

The most important parts are:
1. Sample data as text, use the table tool in the editing bar
2. Expected output from sample data
3. Explanation in words of how to get from 1. to 2.