If someone gets error about certificates for main ISPConfig here is how to recreate them:
To make SSL work for client sites in ISPConfig:
under ISPManager/Sites/site.com/Basis>SSL - enable
after that there is NEW SLL tab
Enter all data exept SSL Request: and SSL Certificate:
for Action: Create certificate
after that client can use https for login into ISPConfig and phpmyadmin and webmail (if you created Co-Domain for webmail site change forward from http to https)
certificat is self-signed and you get warning but untill you get proper certification this will work.