I was able to download the files with help over chat, on the new portal the products are not visible.
I was able to install all components on a OES2018SP2-Server with all actual patches.
Groupwise 18.3.1 works fine, i have only one problem.
By starting rcgrpwise status i can see that the domain.postoffice have the status "unused".
All rebuilds have not solved the problem, i have open a new call by microfocus and wait of a answer!
This for information for others administrators and customers!