What TeamCity versions are supported by the add-on?

The add-on supports TeamCity 9.0 and newer versions.

What roles and permissions should the user have that is used for integration between JIRA and TeamCity?

You need to grant roles of Project Viewer and Agent Manager to this user account. You need also to create a custom user role (for example, User Profile Viewer) and grant the 'View user profile' permission to it in TeamCity.

What is initial data indexation?

Initial data indexation is an automatic procedure that is launched after the first opening of any TeamCity tab (while browsing projects or specific issues). It indexes TeamCity build data for quick data accessibility when the user views the related projects or JIRA issues.

How often is data index updated?

Data index is a set of TeamCity build data that the add-on uses for display in projects and issues. Once the initial data indexation is complete, the add-on updates the data index when the user opens the TeamCity tab for the whole project or a specific JIRA issue. If users do not view TeamCity data in JIRA Cloud, the add-on does not temporarily update the index.

Can I configure the data indexation parameters?

Unfortunately, not for now. You can vote for this feature.

Can I remotely trigger builds in TeamCity from JIRA?

Unfortunately, not for now. You can vote for this feature.