Outlook LookForDuplicates Icon

Outlook LookForDuplicates

Find and remove duplicate items in Outlook such as contacts and mails.

4.4 Stars (14)
46 Downloads (This Week)
Last Update:
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Find&remove duplicates easily! This VBA-Script with a form searches for duplicate entries of any type (calendar, contact, e-mail, notes, task, etc.) across folders in Outlook. Suspected doublets are listed and can be moved to the folder for Deleted Items.

Outlook LookForDuplicates Web Site



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User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
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User Reviews

  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Littlebit hacky install but OK, just it doesn't matter. This is cool thing. Working great with Office 2013

    Posted 12/22/2015
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Works Perfectly, great job, i removed 667 duplicates emails, Thank you very much. Windows 10 64 bits Microsoft Outlook 2007

    Posted 12/18/2015
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    I'm in the midst of upgrading users from Office 2003/7 to Office 2013 and Office 365/Exchange Online on Win7x64 machines. With some management positions wanting to sync their calendars to mobile devices, I had a user whose calendar was receiving multiple (like hundreds) duplicates syncing from a 3rd party smartphone app. Although I don't write code and had never used Outlook's VBA Editor, I did get this to work perfectly on the user's profile after a few false starts (was missing a reference library). I just used this for a second time while merging an old .pst file with a synced Exchange account; I needed to copy the calendar over to the new Exchange profile, but the user had already added some (duplicate) appointments. This tool made it a breeze and I'm not picking through the calendar for hours manually removing duplicates. LookForDuplicates has earned a permanent spot in my IT toolkit!

    Posted 11/25/2015
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Works perfectly. Saved me hours!! Win-64. Outlook 2013 (x32). As others have mentioned, read all the instructions in the wiki.

    Posted 06/28/2015
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Used it do remove (hundreds of) duplicates in calendar, Outlook 2007. With the help of the Wiki (see installation guide) it worked instantly and like a charm. Thanks so much!

    Posted 02/21/2015
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Additional Project Details


English, German

Intended Audience

Advanced End Users, System Administrators, End Users/Desktop, Other Audience

User Interface

Win32 (MS Windows)

Programming Language

Visual Basic for Applications (VBA)



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