UPN will not work with older clients like W98 and prior. Maybe it's for backward compatibility but W98?? Thanks for the input JD.
May I humbly suggest that you really should replace anything older than Win8? Changing the W98 machines to Win7 would be better, even though Win7 is going end of support shortly.
Edit: Unless I misread and this is MSFT retaining backwards compatibility to Win98. In which case, uh, I absolutely have clients with e.g. domain-joined HVAC controllers that run on Win98 that won't be going away any time soon. What horrors lie in network shadows.
We're all Win10 but being x-manufacturing, I understand the need to retain old OSs. Still wish they would allow both user name types. It doesn't take much to confuse the end users when you have different naming conventions at password time.
>We're all Win10 but being x-manufacturing, I understand the need to retain old OSs.
I have a manufcaturing client still using MS-DOS. The MS-DOS computers are embedded into large one-off custom built factory machines. The cost of changing the manufacturing plant is eye watering. So MS-DOS will be around for a while for them.