Upgrade Ubuntu 18.04 LTS to 20.04 LTS with Zimbra 9 build by Zextras - Zimbra Build by Zextras - no Zextras support guaranteed https://community.zextras.com/forum/zimbra-ose-9-by-zextras/upgrade-ubuntu-18-04-lts-to-20-04-lts-with-zimbra-9-build-by-zextras/ Zextras Community Discussion Board en-US Sat, 06 Jun 2026 19:29:59 +0000 wpForo 60 Upgrade Ubuntu 18.04 LTS to 20.04 LTS with Zimbra 9 build by Zextras https://community.zextras.com/forum/zimbra-ose-9-by-zextras/upgrade-ubuntu-18-04-lts-to-20-04-lts-with-zimbra-9-build-by-zextras/#post-4695 Sat, 18 Mar 2023 07:51:59 +0000 Hi Everyone, hope this is the right place to ask the question  below.

I have a Ubuntu 18.04 VM on proxmox hipervisor on which is running Zimbra 9 build by Zextras. Everything is working fine. Now I need to update Ubuntu to 20.04 LTS. Could someone tell me if there is a good howto in order to update Ubuntu and Zimbra 9 build by Zextras ? On the same server I have also installed a let's encrypt certificate. Thank you in advance for the help.

]]> Zimbra Build by Zextras - no Zextras support guaranteed capnino https://community.zextras.com/forum/zimbra-ose-9-by-zextras/upgrade-ubuntu-18-04-lts-to-20-04-lts-with-zimbra-9-build-by-zextras/#post-4695