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davebo4503
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Outlook contact folder 'one or more items in the folder you synchronized do not match - to resolve the conflicts, open the items, and they try this operation again'

Outlook 2016 client on Exchange 2010 server fully patched.
User has a contacts public folder, within that folder is another contact folder called clients.
When adding or modifying a contact in that folder, when you go to save the following error appears:

Microsoft Outlook
One or more items in the folder you synchronized do not match.  To resolve the conflicts, open the items, and then try this operation again.

There is no obvious conflict within the clients folder or the parent contacts folder.

If I click folders and look at Synch Issues, and its subfolders, conflicts, local failures, server failures, those are all empty.

This is cache mode, so I tried creating a new profile with cache mode and another with cache mode off, same error in the same place.

Does anyone know if there is a log that points to whatever conflict Outlook thinks there is?  I see no indication of that, but no changes can be made.  This is new behavior in the last week or so - previous any changes saved OK.
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strivoli

8/22/2022 - Mon
strivoli

What happens when you add a Contact (in that Folder) using another PC with Outlook 2016 or another version? This helps isolate the issue.
davebo4503

ASKER
same thing
strivoli

You are having issues with the Child Folder. Call it Child1. Please create a Child2 Folder (it is at the same level of Child1) and add a Contact in Child2. Success or Error?
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rwheeler23
strivoli

I might think Outlook reports sync issues when it is a permissions issue. This issue happens even if it is Administrator to add the Contact?
davebo4503

ASKER
Normal users update the folder and have successfully for years - No permissions have been changed so unless an Exchange rollup changed something that's not the issue.  It's a public folder with everyone access.

Will try the child 2 idea and if that works will try to copy the contents across and see what happens.  Any thoughts on doing a straight copy vs export and import?
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strivoli

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