How to remove duplicate emails on MS server?

john kwok 0 Reputation points
2025-12-01T04:53:45.12+00:00

I have on my server up to 4 duplicate emails per original emails. How do I get rid of thed duplicates? These are on my Microsoft server linked to my account.

Microsoft 365 and Office | Office Online Server
0 comments

3 answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. ashish singh 0 Reputation points
    2026-10-06T12:06:34.4233333+00:00

    If you're dealing with duplicate emails across PST files (common after repeated imports, backups, or sync issues), a dedicated tool like Shoviv Outlook Duplicate Remover handles this more reliably than manual cleanup. Just load your PST file(s), choose the duplicate-detection criteria (sender, subject, date, or a combination), and run the scan. The tool identifies and removes duplicate emails, contacts, and calendar items, then saves the cleaned result as a new PST file — so your original stays untouched until you're satisfied with the output. It supports scanning multiple PST files together, which is useful if duplicates are spread across several mailboxes or backups. A free trial lets you test it on a limited dataset first.

    Read more: https://apps.microsoft.com/detail/xpfp6r4nzw7vpg

    Was this answer helpful?

    0 comments
  2. Anonymous
    2025-12-01T06:12:47.95+00:00

    Dear john kwok
    Welcome to the Q&A forum and thank you for sharing your concern with us.

    Based on the information you provided, I understand that you currently have up to four duplicate copies of each original email on your Microsoft server. This issue is typically caused by synchronization errors, incorrect email client setup, or issues during a mailbox migration process.

    To ensure I can provide you with the most effective and precise solution, I need to clarify a few details regarding how you access your mailbox.

    Could you please let me know which application you are currently using to check and manage your emails?

    • Are you using a specific email application (like Outlook, Apple Mail, or another program)?
    • Or are you accessing your mailbox directly through a web browser (e.g., Outlook Web Access/OWA)?

    This information is crucial as it will help me determine the most appropriate method for cleaning up the duplicates.

    We look forward to your prompt response so we can assist you further and resolve this matter quickly.

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

    Was this answer helpful?

  3. AI answer

    2025-12-01T04:53:52.7466667+00:00

    To remove duplicate emails on a Microsoft server, you may need to follow a few steps to identify and delete the duplicates. Here are some general guidelines:

    1. Use Outlook's Cleanup Tools: If you are using Outlook, you can use the built-in cleanup tools to remove duplicate emails. Go to the Folder tab, and select Clean Up Folder or Clean Up Conversation to remove duplicates.
    2. Third-Party Tools: Consider using third-party tools designed to find and remove duplicate emails. Tools like "Duplicate Email Remover" or "Outlook Duplicate Remover" can help automate the process.
    3. Manual Deletion: If the number of duplicates is manageable, you can manually go through your inbox and delete duplicate emails. Sort your emails by subject or date to make it easier to identify duplicates.
    4. Check Server Settings: Ensure that your email server settings are not causing duplicates. Sometimes, settings related to email forwarding or syncing can lead to duplicate emails appearing in your inbox.
    5. Backup Your Data: Before making any changes, ensure that you back up your emails to prevent any data loss during the cleanup process.

    If the duplicates persist, you may need to consult your IT department or Microsoft support for more advanced troubleshooting specific to your server configuration.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

    Was this answer helpful?

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.