Created a separate topic because for some reason I can't answer my own post on the other topic about the availability of an offline install ...
I have been told by support there is no available offline installation for the 2017 products. Too bad ... The only workaround was to perform a full install on a different computer. After installation was completed on that second computer, a "setup" folder was created and it could be (hopefully) copied to finally perform an offline installation on the original target.
If you log in to your Corel account, under "downloads" you should find the full installer. I always download these and store on a local disk.