In ISPConfig v2 is field SSL Days why in v3 the fileds being not available ? Sorry for my poor English
ISPC3 is not an upgrade to ISPC2, it is a whole new piece of software, so everything is different. There are some features in 3 that are not in 2, and some in 2 that aren't in 3.
I understand this but setting the validity of the SSL is a standard in my opinion and should not be imposed 10 years