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+--- Thread: Why does Outlook keep creating duplicate items after syncing? (/showthread.php?tid=81456)
Why does Outlook keep creating duplicate items after syncing? - techinmay - 10-09-2025
Hey,
My Outlook keeps creating duplicate items after syncing — is there a tool that can automatically clean up all duplicates?
Later, I found one & now I'm sharing with you all.
Yes, this is a common issue when syncing across multiple devices or services, especially if there are interruptions or overlapping sync operations. A reliable solution is SysTools Outlook Duplicate Remover. It automatically scans your PST, OST, or BAK files to detect and remove duplicate emails, contacts, calendar entries, tasks, notes, journals, etc. You can run it in within-folder mode or across-folders mode, apply filters like date, sender, or subject, and even choose whether to delete duplicates permanently or move them to another folder for review. It preserves folder structure, keeps data integrity intact, supports batch processing (so you can clean up multiple mailbox files at once), and works with all newer Outlook versions. This tool helps stop duplicates from piling up and keeps your Outlook clean without having to manually hunt them down.
RE: Why does Outlook keep creating duplicate items after syncing? - Thomusperker - 10-14-2025
Outlook creates duplicate items after syncing, mainly due to synchronization conflicts between the mail server and the Outlook client. It can happen if the same email account is added multiple times or if network interruptions occur during syncing. Then you can use a perfect way like the TrustVare Outlook Duplicate Removal tool. It will automatically find duplicate PST files like emails, contacts, tasks, notes, etc, and quickly remove them within a few clicks. The software removes duplicate PST files without downloading any application. The tool supports all Windows OS versions, like 11, 10, 8.1, 8, and 7. Non-tecnical users can also use this tool without any technical skills, and they can use the free demo.
Visit here: https://www.trustvare.com/duplicate-remover/pst/
RE: Why does Outlook keep creating duplicate items after syncing? - FrostByte77 - 10-14-2025
Hello everyone...!