Sometimes a spouse non-constituent record becomes un-linked. You can re-create that link through the spouse-relationship record, but you cannot do this from the spouse addresses on the address tab. Everything about the spouse addresses process (Address -> Copy/Share address from constituent) is identical with the process within the spouse-relationship record except you can't search & copy/share from the primary record, which is the address record that I need to copy/share. This is misleading how the processes are nearly identical. It works from relationships, but it does not work from addresses. Could you update this process so the spouse-non-constituent record can be linked from the address?