I am a new ZCS admin and have only had my ZCS 8.8.12 up and running for about 2 months. It has always been 8.8.12 running on Ubuntu 16.04. I have upgraded through patch 4 via apt in Ubuntu. But 8.8.15 is not showing up as an upgrade.
I've read through the release notes, the release notice and everything and can't find any info to get me started. As someone new to Zimbra, but fairly experienced with linux, what gotchas should I look for?
Should I worry about plugins (we use very few except a few by Barry de Graaff/Zeta Alliance) and is there distinct upgrade or "watch out for this" type stuff with plugins?
