Cannot register the hard disk 'newD365FO.vhd' because a harddisk 'oldD365FO.vhd' with UUID already exists.
In order to fix the problem we need to do the following:
1. Open cmd.exe as admin and run the following
2. cd
C:\Program Files\Oracle\VirtualBox\
3. VBOXMANAGE.EXE internalcommands sethduuid "C:\locationofd365vhd\FinandOps8.0withPlatUpdate15.vhd"
Once
this has been completed continue adding the disk to a new vm setup like you
normally would and you should no longer get the error.