Hi Manfred,
Do you choose to “send updates to all attendees”? What if we send updates only to added or deleted attendees?
Please first test this issue on the web mail to see if issue can be reproduced. This helps determine whether it lies on server side or client side.
If issue only occurs on Outlook client, we can try opening Outlook in safe mode to see if the issue continues. Please exit Outlook, press Win key + R to open the Run command, type outlook.exe /safe and then press Enter. This helps eliminate whether the
problem lies on any third party add-ins.
What’s more, if safe mode doesn’t help, please
create a new profile to test the results.
Besides, what's the detailed version of Outlook? Please install available updates.
Any updates, please feel free to post back.
Regards,
Perry
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