Hi DSPatrick,
Thanks for the help - I am running the DVD, and using the 'setup.exe' as the starting program, launching it from the existing Server 2016 operating system. It runs through all the initial set-up procedures - entering the license key etc., but just will not give the option to 'Keep files, settings and apps'.
I'll have a look at the log files and see if I can decipher anything that may help.
I appreciate you help,
Allen