Watching for an answer to this as well
Hi @community-manager and @Meredith,
Welcome to Box Community, and glad to assist!
You can’t “resolve” comments in Box the way some tools do — Box keeps comment history in Activity and doesn’t offer a first‑class “resolve” state for regular comments. You can only reply to, edit (your own), or delete comments.
Instead, you could use Tasks instead of plain comments for review items you want to mark done. Tasks have explicit states (Mark as Complete / Approve / Reject) and those state changes are shown in Activity and Task Center. For more details, please see this article.
Hope it helps! Please let us know if you have additional questions.