Problem with modifying appointment

[apetin20]

I have shared an appointment with multiple participants. Now, every time I try to modify the appointment (time/textual content/cancel appointment), I get an error message. The text of the error message is: "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". At the appointment, the diamond symbol indicating a data conflict is visible. Suddenly, the appointment itself has also been added as an attachment. Deleting this appointment within the meeting does not help resolve the conflict. What can I do to resolve this data conflict? 

[#2]

Hi @apetin20,

you can try this options:

Option 1:

To mitigate the issue, you can use the Clear Offline Items for your calendar. This step clears the calendar items in the Outlook store (OST) on your local machine.   

To clear offline Calendar items, follow these steps: 

1. Open the Calendar pane in Outlook, and right-click the Calendar folder.

2. Select Properties.

3. On the General tab, select Clear Offline Items.

4. Select OK.

After you clear offline items, Outlook will re-sync the calendar and repopulate your calendar folder with the calendar items on the server. 

Option 2:  

Make the meeting updates in Outlook Web Access (OWA) or use New Outlook. The conflict does not occur when updating or cancelling the meeting in OWA or New Outlook. 

Outlook shows conflict errors when updating or cancelling meetings - Microsoft Support

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Kindest regards,

Leon Pavesic
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[#3]

@LeonPavesic thank you for your reply.

Using Outlook Web Access, I have managed to update my appointment.

However, when going back to the desktop version, my Outlook appointment still shows the diamond with arrows - in addition, a new attachment with the online update now appears.

[#4]

Hi,
Has anyone been able to determine the root cause of this? We are seeing this error on invites that are not even being updated. Thanks

[#5]

@LeonPavesic I had the same problem and tried Option 1 and it wiped literally everything from my calendar except the meeting I created!! How do I get everything back??

(the diamond and attachments are no longer there in the meeting invite at least)

[#6]

@LeonPavesic 

I don't this this resolution is a long term solution. Looks like MS intentionally inserted this bug in Outlook this year. 

The new outlook is even more buggy as well as many features are missing. It makes life even more difficult. 

[#7]

@apetin20 

Found a temporary fix to this, double click on the Data conflict icon to bring up the conflict message panel, from here choose the account you want to keep the file for(you should get an option for your online account and offline one)

After choosing 1 of these accounts to keep the file, you will be able to edit the appointment and even cancel if need be.

[#8]

This solves issue as long as an error pop-up window fits your screen. If it doesn't, you first need to learn to maximize it from taskbar or move it around so that you could find the necessary buttons to resolve conflicts at all:) I had to do it for week of meetings because one of the "bonus advantages" of this bug are daily reminders of those conflicted meetings that can't be cancelled until you solve this unprovoked conflict 🙂 On the bright side, MS experimets motivate us to learn to do new stuff with the system 😄

[#9]

Buongiorno,
l'opzione 1 non risolve il problema, qualcuno è riuscito a risolvere??