Can corrupted Outlook data files cause indexing to pause on Windows 11?

Yes, corrupted Outlook data files (like PST or OST files) can definitely cause Outlook indexing to pause or fail on Windows 11. The indexing process relies on the integrity of these files. If corruption is detected, the Windows Search service might pause indexing for that specific data source to prevent further issues. Running the Inbox Repair Tool (SCANPST.EXE) is often the solution.