I've read tons of posts about Jenkins/Jira integration and played with both "Jira plugin" and "Jira Software Cloud plugin", using pipelines.
1) With the "Jira plugin" I was able only to build a link to the Jira ticket by using Jira ticket name in the commit message (using jiraSendBuildInfo).
2) "Jira Software Cloud plugin" allows to link Jenkins build to the Jira ticket.
I understand that I can modify Jira ticket status either by building Jira triggers or by pipeline scripting with Jira API calls, but I still hope that such a feature exists out-of-the-box...
According to the docs, Jira plugin should be able to modify Jira ticket status, but I couldn't find pipeline examples.
TIA,
Vitaly