The current one is RHEL 7.2.
It needs to be this:
https://developers.redhat.com/download-manager/content/origin/files/sha256/12/120acbca7b3d55465eb9f8ef53ad7365f2997d42d4f83d7cc285bf5c71e1131f/rhel-server-7.3-x86_64-dvd.iso