You used to go under window / swatch libraries. Now there is nothing there.
I think you are confusing InDesign and Illustrator. With InDesign you access the color libraries from the Swatches panel—Swatches>New Color Swatch>Color Mode—from there you can choose a Pantone library and search for a specific color.
Thank you, yes you are right. I guess I am spacey for Christmas. After 20 years you would think I had this!