@Reheer
Hi
A lot of Web-Apps (Not only Java based ones!) NEED a valid SSL Cert on your AD.
The AD uses a self generated cert, even if NethServer has LE certs.
What you can do is have the Certs copied over (And the name / fqdn for your AD in the cert).
See here:
And look for this string:
" The next step will make sure that java and other more strict apps can connect to the AD and use it :"
I have this working on my home NethServer…
My 2 cents
Andy