How to Remove Duplicate Calendar Entries in Outlook? Simple Methods

  

Published By Jamie Kaler 

Approved By Rollins Duke

Published On July 8th, 2025

Reading Time 5 Min Read

Why Do Duplicate Calendars in Outlook Appear?

• When you use Outlook on both your computer and your phone(tablet), each device tries to keep the calendar updated. If the sync settings are too aggressive or not working properly, the same event might get added more than once.
• If you have imported Calendar(ICS or PST file) more than once may be by mistake during transfer data then it creates duplicate events in Outlook calendar. Outlook has no option to avoid importing duplicates. But if it’s not enabled, it will copy everything again.
• Sometimes, if you accept a meeting event multiple times(especially from different devices). Outlook might add it to your calendar each time even though it’s the same meeting.
• Outlook uses a profile to manage your account. If the profile becomes corrupted, or if Outlook has trouble syncing with the mail server, it may repeat calendar events during each sync attempt.
• Some external calendar tools, mobile apps, or CRM Integration can interfere with Outlook. They may accidentally duplicate entries while trying to sync or manage appointments on your behalf.

Methods to Remove Duplicate Calendar Entries in Outlook

If your Outlook calendar is cluttered with duplicate events, there are few simple ways to remove them manually. These approach are built into Outlook and doesn’t require any extra tools:

Method 1: Switch to List View & Delete Manually

1. Open Outlook and Navigate to your Outlook Calendar and click on the View tab.
   
2. Press on Change View and hit on List and scroll through the list and look for duplicates.
   
3. Hold CTRL to select multiple entries and then press Delete.
   

Method 2. Sort and Group Events by Subject and Date

1. While in List View and click on Sort By.
   
2. Change Calendar View Settings.
   
3. Find Outlook duplicate calendar entries and delete them.
   

Method 3: Use Search or Filter Tools

1. Use the Search Box appears on the upper side of the calendar list.
2. Type event name as you have seen duplicate.
3. Review search results and remove any duplicates.

Useful Features of Automated Approach

• This software is one of the best to remove duplicate emails in Outlook.
• It offers a simple initiative interface to make it more reliable to operate by any beginner and technical expert users.
• You can also use filter options such as export selective data, date range, subject, from, to, saving folder naming, exclude empty folder, create Error log, separate PST per user, change language, Export only selected Outlook items.
• With this wizard, you can use Auto detect feature and also allows you to select Outlook files from any custom location.
• It offers you to remove duplicate items from batch Outlook files without facing any restrictions.

Helpful Questions

How do I Remove Duplicate Calendar Entries in Outlook?

To remove duplicate calendar entries you need to Switch to List View in your calendar, sort by Subject or date as user comfort then locate and repeat duplicate Calendar entries in Outlook. You can also use Search filters or Alternative Tool to remove large numbers of duplicate entries quickly and safely.

Why is my Outlook Calendar Showing Double Events?

Outlook Calendar showing double events due to syncing with multiple devices, imported calendar multiple times, or accepting meeting invites more than once. Faulty rules or third-party apps may create duplicate entries in Outlook.

How do I Stop Duplicate Calendar Invites in Outlook?

To Stop Duplicate Calendar invites in Outlook, you need to avoid accepting the same meeting from multiple devices. Also, check calendar view settings, disable suspicious add-ins as it can create duplicate calendar invites in Outlook and verify Outlook isn’t sync multiple times.

Why does my Outlook Keep Duplicating Meetings?

Outlook keeps duplicate meetings due to sync errors, repeated calendar entries, corrupted mail profiles or third-party tools. Review your sync settings, clean up old profiles, and avoid re-accepting the same invites.

Closing Remarks

In this tutorial, we have covered everything that is required to Remove Duplicate Calendar Entries in Outlook by Outlook inbuilt feature and also discussed Alternative Solution. You can opt any of them based on your requirement. If users face extreme convenience using manual approach. So, you can opt Professional Choice as it can easily remove duplicate entries and events in Outlook without having advanced technical information.