Two questions:

Question

1- Can I upgrade from 8.16 to 8.20?

The "plan your upgrade" only lists up to v8.19.1 (recommended)

2- How to install a wildcard certificate?

I have a registered comodo wildcard DV certificate.  How do I install this new certificate so Jira will start using it?

Robert Wen_Cprime_ · Answer

It should be.  8.16 is a relatively new release and 8.20 is the new LTS replacing the previous LTS (8.13).

Has the Upgrade Center published the new version yet?

Eric Kochis · Answer

So is a direct upgrade to 8.20 from 8.16 supported?

Robert Wen_Cprime_ · Answer

1. It looks like 8.20 was released today so the entry in "Plan your Upgrade" has to catch up.