Remove Duplicate Calendars in Outlook: 3 Fixes That Work
Duplicate calendars in Outlook appear when the same calendar is synced from multiple sources, after a PST import or due to account misconfiguration. You can remove duplicates manually through Outlook’s account settings or use the Turgs Outlook Duplicate Remover to clean multiple PST files at once without touching emails.
Opening Outlook and seeing two or three copies of your calendar is disorienting. Every appointment appears twice. Reminders fire multiple times.
This guide shows you why duplicate calendars in Outlook appear and three ways to remove them.
Why Duplicate Calendars Appear in Outlook
The most common causes:
- Multiple account syncing. If you have the same calendar connected via IMAP, Exchange and a local PST, Outlook shows all three as separate calendar sources.
- PST import. Importing a PST file that contains calendar items into an account that already has those items creates duplicates.
- Google Calendar or iCloud sync. Third-party calendar sync tools can create a second calendar layer on top of your existing Outlook calendar.
- New Outlook profile. Creating a new Outlook profile and connecting the same accounts adds a fresh calendar source alongside any old ones.
Fix 1: Remove Duplicate Calendars via Outlook Account Settings
If the duplicate calendars come from multiple connected accounts:
- Open Outlook and go to File then Account Settings then Account Settings.
- In the Email tab, check whether the same account appears more than once (e.g., connected via IMAP and Exchange simultaneously).
- Remove the duplicate account connection. Keep only the Exchange or the IMAP connection, not both.
- Restart Outlook. The duplicate calendar should be gone.
Fix 2: Delete the Duplicate Calendar Folder
If one of the duplicate calendars is a local folder rather than a synced account:
- In Outlook, go to the Calendar view (bottom of the navigation pane).
- In the left panel under My Calendars, right-click the duplicate calendar.
- Select Delete Calendar.
- Confirm the deletion. This removes the folder and all events in it from Outlook.
Only delete the duplicate if you are certain the events it contains are already in the primary calendar. Check both calendars for unique events before deleting.
Fix 3: Remove Duplicate Calendar Items with the Turgs Duplicate Remover
If the duplicate issue is at the item level (the same event appears twice inside a single calendar), the Turgs Outlook Duplicate Remover scans PST files and removes duplicate calendar entries, emails and contacts in batch mode.
Step-by-Step: Remove Duplicate Calendars from PST
Step 1. Launch the Turgs Outlook Duplicate Remover.
Step 2. Click Add Files or Add Folder to load your Outlook PST file.
Step 3. Select the Calendar folders in the PST file. Tick only Calendar if you want to remove duplicate calendar items without touching emails.
Step 4. Set the output path for the cleaned PST file.
Step 5. Click Remove Duplicates. The tool scans the calendar data, identifies duplicate events and removes them from the output PST.
For related Outlook troubleshooting, see the guide on the OST is not an offline folder file error. And if you need to find a PST password before cleaning it, see the Outlook PST password guide.
Did the duplicate calendars appear after a PST import, or after connecting an additional email account?
Frequently Asked Questions
Why does Outlook show two copies of my calendar?
The most common reason is having the same account connected twice (once as Exchange and once as IMAP), or having imported a PST file that contains the same calendar data already in your account.
Will deleting a duplicate calendar delete my events?
Yes, deleting a calendar folder deletes all events in it. Make sure the events in the duplicate calendar already exist in your primary calendar before you delete the duplicate.
Can I merge two Outlook calendars into one?
Not directly in Outlook. Export one calendar to an ICS file (File then Save Calendar), then import the ICS into the primary calendar. After importing, delete the source calendar folder.
How do I stop Google Calendar from creating a duplicate in Outlook?
In Outlook, go to File then Account Settings then Internet Calendars. If you see your Google Calendar subscribed here as well as connected via the Google Workspace account, remove the Internet Calendar subscription. Keep only the account connection.
Does the duplicate remover work with Outlook 2021 and 2019?
Yes. The Turgs Outlook Duplicate Remover supports PST files from all Outlook versions including 2007 through 2021.
Can I preview duplicates before removing them?
Yes. The tool shows a preview of duplicate items found before deletion so you can verify which events will be removed.
