I am working on a 600+ page book in Indesign. I have it set up as a book. There are multiple places throughout the book that references back to a different chapter and we want to put a page number that corresponds with that chapter sort of like how the index works automatically. I've been trying to figure out if that is a possibility. Does anyone know if this is a feature yet?
It sounds like you want to use the Cross-References panel. Refer to Cross-references in InDesign Help.
As Steve says – cross-references. Easy to set up and the marvellous thing is, if you change the pagination all the numbers automatically update.