Hello, I need to take a working ISPConfig 3.1 latest with patch3 on debian 10 buster which has a hundred or so dns entries, a hundred website entries and a hundred email accounts and mailboxes - and change buster to Ubuntu 18.04 LTS. This might bo smoothly just changing the apt sources and doing it slowly - which is what I am going to try. My question is - will a backup of ispconfig3 on buster contain all the data (the above-mentioned entries) and can it be restpored into a freshly-built same type of server on Ubuntu 18.04 - using the same software - apache2 worker, dovecot, postfix mariadb, etc? Would you recommend doing any kind of ftp download (for example of apaceh2 vhost files or mbox for mail or bind9) etc? in case I can't restore from the backup? I will do a full mysql dump and also by database dumps. Thanks for any tips on this - I have to do the downgrade from buster to ubuntu 18.04 .