More than 3 authors won’t et al

Every time I use endnote in word and there is more than 3 authors, endnote won’t use et al. I am in apa 6. Please help. I’m very new to this and it’s so frustrating 

in text citations or bibliography?  Attached is the image of what is in APA 6th, for citations.  YOu would change the yellow to what is already there in subsequent.  

if bibliography, you would do the same in author list of Bibliography.  

Then change to a NEW name and use that new named style in the word document.