In InDesign: Edit > Preferences > Clipboard Handling.
Before copying from Illy, make sure all checkboxes in Clipboard section are unticked.
Thanks for your response Winterm, but this does not work. I unchecked the boxes in the Clipboard section, but Indesign still pastes the vector from Illustrator as a pasted graphic and I am unable to manipulate any anchor points.
Actually, that may have worked. I unchecked everything like you said and when I pasted it didn't work, although when I turned it back on, it worked. May have just needed reset or something? Thanks for the assistance!
Usually, the trick is what I mentioned in the first post: before copying from Illy.
If you copy, then paste, delete what pasted, change clipboard options and try to paste again - it won't work.
You need to go back to Illy and copy a 'fresh' copy.
Whatever, glad you worked it out.