Linking phone to PC creates duplicate contacts

Could you post a link to the Stackoverflow page where you found that script? I'd like to give it a try myself. Thanks.

Workaround to remove duplicates using VBA in Outlook.

Sub DeleteDuplicateContactsInSelectedFolder()
Dim i As Long
Dim n As Long
Dim Message As String
Dim Items As Object
Dim AppOL As Object
Dim NS As Object
Dim Folder As Object
Set Items = CreateObject("Scripting.Dictionary")
Set AppOL = CreateObject("Outlook.Application")
Set NS = AppOL.GetNamespace("MAPI")
Set Folder = NS.PickFolder
'Set Folder = NS.Folders("*** Email address is removed for privacy ***").Folders("Contacts").Folders("Galaxy S23 Ultra (contacts synced by Link to Windows)")
If Folder.DefaultItemType <> 2 Then Exit Sub
n = Folder.Items.Count
Dim duplicates As Integer
duplicates = 0
For i = n To 1 Step -1
    On Error Resume Next
    Contact = Folder.Items(i).FirstName
        If Items.Exists(Contact) = True Then
        Folder.Items(i).Delete
        duplicates = duplicates + 1
    Else
        Items.Add Contact, True
End If
Next i
If duplicates > 0 Then
MsgBox "Removed contacts number: " & duplicates, vbOKOnly
End If
ExitSub:
Set Folder = Nothing
Set NS = Nothing
Set AppOL = Nothing
End Sub

Same here. Over 20k contacts. Contacted Outlook Android app support who eventually told me it's nothing to do with them and I had to contact Outlook.com support. Contacted Outlook.com support who told me I needed to contact Outlook.com support...

Since the issue I have deleted the link to windows app on both phone and PC. Deleted all contacts from my MS account in the Google Contacts App. This deletion has carried over to my main Outlook however they remain in Outlook.com and the new Outlook (pre) app on PC.

I've complained to the support and feedback that this issue could be easily resolved if we could just delete our own contacts and not be restricted to 10 at a time. I've had the unfortunate experience that these contacts didn't flow to my Outlook where other seem to have been able to bulk delete.

Hello, I'm Greg, here to help you with this.

It could be a bug. Are the duplicates in Windows 11, Android or both? Since it syncs the data between them, it should be in both. So you can merge duplicates in Android and see if it sync's to PC:
https://support.google.com/contacts/answer/7078...

Let me know what happens. If you want to report this as a bug to Microsoft use the Feedback Hub app in Start Menu where developers are tasked to process consumer feedback. They will not even see it here. Microsoft developers DO read feedback from customers that comes in via the Feedback Hub, so that is a great way to share your thoughts on how to better serve you as a customer.

Feel free to ask back any questions. Based on the results you post back, I will have other suggestions if necessary.

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This happens to me, 14,000 contacts from a base of 356 original contacts. Some contacts copied or synced to my phone, with each having over 100 duplicates. This is definitely a bug. Has happned to me 3 times now, and no shortcut as must delete them all then restore individual contacts ... for me this is 365 contacts. Over 3 hours of work to fix their problem.

Same for me! Some contacts has numerous copies now. I went from 800 regular contacts to 3000+ with duplicates.