Before we dive into the keyword, let's understand the software. Office Timeline is not a Microsoft product; it is a third-party add-in available on Microsoft AppSource. It comes in several editions:

: You can create basic timelines, Gantt charts, and Swimlane diagrams with up to 10 tasks/milestones per slide.

If you purchased a license and want to verify it, here is the official process—not a hack, but a safety check:

Instructions on how to into the free version.