When using the JIRA feature to notify a Zendesk ticket (based on instructions from this article on updating a ticket when the status of a JIRA issue changes), why is the comment posted as the JIRA admin who created the integration?
When using this feature, all comments are posted via the JIRA integration admin unless you have previously created a Zendesk admin and a Zendesk for JIRA user. You can find more information on how to set this up in the following article:
In Zendesk, set yourself up as an administrator with a generic name for performing the setup. For example, create and use a Zendesk administrator called Zendesk Support. For more information, see Managing users. This is important because in the integration, all escalations from Zendesk to JIRA are reported as coming from the Zendesk admin who set up the integration. Setting yourself up as a generic admin ensures that all future escalations are from Zendesk Support, not your personal user account.
The same consideration applies in the other direction, from JIRA to Zendesk. The integration creates a free admin user called Zendesk for JIRA that can be ideal for this purpose (JIRA Cloud only). You can also set yourself up as a JIRA administrator called JIRA Dev or JIRA Product for performing the setup. You can change the avatar of the user on the Profile page, as you would with any other user.