Links don't contain "www"

Hey guys!

I recently made it so that our website resolves to http://www.domain.com instead of domain.com.

We did this because within the office the website won’t work without the www (interferes with internal dns).

So the site shows up now! but whenever someone clicks a link it says unable to connect because the link URL doesnt have the www.

Where can I change this so that links have this? The links aren’t hardcoded