So I'm fairly new to Tableau only been using it for about a week now. Our Co. has the server version so we have pretty robust access to the platform.
Here is my situation: A sheet in my workbook is using a blend of 2 tables, the majority of the data comes from one table and I only use the other to pull in account names, similar to a v lookup in excel. I've been able to create the workbook to the point where it is EXACTLY how I want to see it BUT when I publish to the server i get a bunch of NULL values showing up that I was able to suppress in the workbook.
Image of the sheet published to the server:
Image of the workbook in Tableau before publishing: