Duplicate mailbox items in Outlook usually come from sync quirks (IMAP/Exchange), repeated PST imports, misconfigured rules, or multi-device re-downloads—so “Outlook duplicate remover software” is useful only when you first identify the duplication pattern and choose the right dedupe scope (per-folder vs cross-folder vs tenant-wide). Outlook also includes a built-in “Conversation Clea... https://dev.to/deni_denial_bfbe81ea551ee/outlook-duplicate-remover-software-to-eliminate-duplicate-mailbox-data-46p2