Refresh your calendars
- On your iPhone, iPad, or iPod touch with iOS 7 or later, open the Calendar app, then tap Calendars at the bottom of your screen to see your list of calendars. Swipe down on the list to refresh.
- On your Mac, open Calendar and choose View > Refresh Calendars.
- On your Windows PC, go to the Outlook toolbar and click the Refresh button in the iCloud section.
If you still see duplicate calendars, find your issue below to get help.
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Remove duplicate calendars on your Mac
To hide or delete duplicate calendars in the Calendar app on your Mac, follow these steps.
Hide calendars on your Mac
- Open Calendar. If you don't see a list of your calendars, click the Calendars button in the upper-left corner.
- Find the section labeled On My Mac.
- Compare the events in On My Mac to the events on your iCloud calendars.
- If your calendars in iCloud show all of your events and the calendars on your Mac show only duplicates, you can hide the calendars on your Mac. To hide a calendar, deselect its box in the section called On My Mac.
Delete calendars on your Mac
If you choose to delete calendars on your Mac, delete only those in the On My Mac section. Don't delete calendars in any other section, like iCloud, Subscriptions, Other, or other calendar services.
To delete calendars on your Mac, follow these steps:
- Make a copy of your iCloud calendar data.
- In the On My Mac section, click the calendar that you want to delete.
- You can delete the calendar in two ways:
- Choose Edit > Delete.
- Right-click and select Delete.
- Choose Edit > Delete.
Remove duplicate calendars on your Windows PC
To hide or delete duplicate calendars on your Windows PC, follow these steps.
![Duplicate email remover outlook 2016 Duplicate email remover outlook 2016](/uploads/1/2/4/8/124895964/612412169.png)
Hide calendars on your Windows PC
- Open Outlook and click Calendar. If you can't see your list of calendars, expand the pane: Click the right arrow button above the Navigation Pane button (Outlook 2007), Folders button (Outlook 2010), or All Folders button (Outlook 2013 and later).
- From the left viewing pane, find the section labeled My Calendars. In Microsoft Outlook, you can find your local calendars in My Calendars, also called Outlook DATA file. By default, this box should be checked so you have access to your local calendar.
- Compare your events in My Calendars to the events on your iCloud calendars.
- If your calendars in iCloud show all of your events, and the calendars on your PC show only duplicates, hide the calendars on your PC. To hide a calendar, deselect the checkbox next to the calendar. If some events on your PC aren't in iCloud, try manually importing your events to iCloud. Open iCloud for Windows, deselect the “Mail, Contacts, Calendars, and Tasks” checkbox, and click Apply. Select the checkbox again and click Apply.
Delete local calendars on your Windows PC
- Make a copy of your iCloud calendar data.
- In My Calendars on your PC, right-click the calendar that you'd like to delete and choose Delete Calendar. Outlook won't let you delete the default Calendar, but you should be able to remove other calendars that you have permission to delete.
If you see duplicate Google calendars on your iPhone, iPad, or iPod touch
If you see duplicate Google calendar data in your iCloud Calendar, you can hide or delete your Google Calendar.
![Outlook Outlook](/uploads/1/2/4/8/124895964/753068863.jpg)
Hide your Google Calendar
- Open Calendar.
- Tap Calendars at the bottom of the screen.
- Find the section Gmail.
- Tap All Gmail to hide all of your Gmail calendars. Or tap a specific Gmail calendar to hide it.
Remove your Google calendar
Go to Settings > Calendar > Accounts, tap Gmail, then turn off Calendars.
If you don’t see On My Mac calendars in macOS
To see the On My Mac section in the Calendar app in macOS, follow these steps:
- Open Calendar.
- Select any of the calendars under the section labeled Other, like Birthdays.
- Right-click outside of the selected option, and select New Calendar. This creates a local calendar under the On My Mac section.
Manage holiday and birthday calendars
You can find calendars for holidays, birthdays, and other events found in apps in the section labeled Other in the calendar list. If you don't want to see these calendars, you can hide them.
Hide holiday or birthday calendars on your iOS device or Mac
To hide Holidays in the Calendar app on your iOS device:
- Open the Calendars app.
- Tap Calendars at the bottom of the screen.
- Scroll down to the section labeled Other, and tap US Holidays or Birthdays to hide it.
To hide Holidays in the Calendar app on your Mac:
- Open the Calendar app.
- Go to the Calendar list on the left side of the window and find the section labeled Other.
- Deselect US Holidays or Birthdays.
Manage duplicate birthdays on your iOS device
If you see multiple birthday events for a contact, check if you have more than one contact card for that specific person. Open the Contacts app, tap the Search field at the top, then enter the contact's name. If you see multiple results for the same contact, tap the contact, the tap edit to manage, delete, or consolidate their contact information.
Overview of Office 365
Microsoft has developed an online productivity suite, Office 365 that contains Online & offline versions of MS Office, Skype for Business, online versions of SharePoint, Exchange, etc. User stores all the data of their Office 365 account for exchanging emails, storing contacts, working on several Office applications on the mailbox. With the presence of duplicate data items, mailbox starts growing in size slowing the performance & access time. The blog will be discussing ways to remove duplicate emails in Office 365 and the removal of duplicate contacts & calendar entries.
Recommended: Backup Office 365 mailbox to PST before removing duplicate items.
Removing Duplicate Items from Office 365 – Why?
The mailbox of the Office 365 account contains all types of data items like emails, calendars, contacts, etc. Like any other mailbox database, Office 365 also supports maximum default storage capacity, which will create performance issues if it reaches or exceeds the limit. Size of the mailbox may increase tremendously due to the presence of duplicate or unnecessary items that can result in slower performance and even lead to corruption. The corrupted mailbox will make the data items inaccessible and may lose the data. User needs to be able to remove duplicate items from Office 365 to avoid the mishaps.
Approach to remove Duplicate items in Office 365
Since there exists no direct method to remove the duplicate items automatically from Office 365 account, we need to extract the mailbox from Office 365 containing emails, contacts, & calendars, etc. to PST file with the help of a third party tool (as mentioned in the above section). Launch the software and login to Office 365 account, select items that you wish to extract like Mails, Contacts, and Calendars and select the output file as PST. You can either use another automated solution named PST Duplicate Remover Tool to Delete Duplicate data from PST.
Or you can open the PST file in Outlook installed in any Windows System and follow the steps below to delete the data items from the mailbox:
1. Delete Duplicate Emails in Office 365
- Launch Outlook and select the folder from which you want to delete duplicate items
- Go to VIEW Tab, click on Change View and change the folder view to a Table Type View
- Right-click a column heading and click Field Chooser
- At the top of the Field Chooser, select All <item name> fields
- Drag the Modified field to the table heading
- Ensure that the duplicate items have a unique date from the original set of items. If it is unique, click the Modified heading to sort the items by this field.
- Select the first item that you want to delete to the last item while you hold down the SHIFT
- Click on DELETE to delete all the selected items permanently.
2. Remove Duplicate Contacts in Office 365
To remove the duplicate contacts from Office 365, login to the Outlook Web Access (OWA) and go to People->Contacts -> Select each contact manually you want to remove.
To remove the duplicate contacts from Outlook email client:
- Select the Contacts folder containing duplicate contacts
- On VIEW Tab in the currentview group, click ChangeView and Click Phone
- Each contact will be listed according to the order of phone number
- Select the contact with same phone number/email address and right-click on it to delete.
3. Remove Duplicate Calendar Entries in Office 365
- In Outlook, Go to Calendar in the Navigation Pane and select the Calendar folder.
- On VIEW Tab in the currentview group, click ChangeView and Click List
- To arrange all the calendar items by subject, Click the Subject column heading.
- Select duplicate calendar items in the list while you hold down CTRL button
- Click on DELETE after selecting all of the duplicate calendar items.
Special Tips: – After reading this post you will get to know that, receiving duplicate emails in outlook 365 is quite easy. But you must have used Outlook for IMAP. If your offline files and is not accessible. Then use the expert suggested way to convert your Offline OST data files into PST file type quickly.
Conclusion
In the blog, we have discussed how to remove duplicate emails, contacts, and calendars from Office 365 account. Since Office 365 does not provide direct deletion of items in Office 365 mailbox, the blog suggests that user can export Office 365 mailbox to PST and duplicate items will be deleted from the PST file through Email Client.