I did what i wanted with excel by using Countif
I have Channel_Session_ID column, i want to count it without any filter and get only when count=1.
The problem is when i do it with ALL-ALLEXCEPT functions, i get memory allocation so i guess those functions are off the table. I wanted to try REMOVEFILTERS function but Power BI said its not a function(its' version is september 2021, don't have any idea about that error). The report column set has columns that are coming from different tables. Any ideas what should i do? 
