Errors moving calendar appointments to delegates calendars.

Question

Hi,

We have a hybrid exchange environment and run Outlook 365 in cached mode.

Since moving to online our executive assistants have noticed that they can no longer copy and paste or drag appointments from there own calendars to delegates without error messages.

The errors are "Cannot copy the items. The function cannot be performed because the message has been changed." and/or "The item cannot be saved because it was changed by another user or in another window. Do you want to make a copy in the default folder for the item?".

The appointments do in fact go into the delegates calendar, but as they are moving appointments around very frequently these messages are a problem.

I have tried recreating the Outlook profile, changing to a different PC, updating Office to build 2006, ticking the "When a reply modifies a message, don’t move the original" box and the "Turn on shared calendar improvements (preview)" box.

I have found this article which does seem to describe the problem but I am a bit confused about the resolution. It says the status is fixed but also the Outlook team is working on a long term resolution.

Are they saying the fix is to turn off reminders and to only move the appointments within the first 1.5 hrs of it being created? Turning off the reminder does stop the error from occurring but this isn't going to work for us. Does anyone have any other suggestions?

Thank you,

David

Answer 1

I also test the delegate permission in my lab and get the same pop-ups:

I think this is a know issue for Exchange online account in Office 365 client. You can post it in the user voice, it may could help this issue repaired.

For the requirement, I find a workaround which may be useful to you:

1. Remove delegate permission from calendar.
2. Use mailbox folder permission to replace it:

First: add mailbox folder permission on the top level this mailbox.

Then: add mailbox folder permission on the calendar folder.

Wait for permission sync successfully, you will could copy appointment from your calendar to target calendar without any issue.

Answer 2

Did you check what version of Exchange your clients are connecting to per that article?
Thats where the server-side fix is:
A fix has been implemented in the service starting with service build 15.20.2730.00 and higher. Use the Connection Status Dialog to confirm the service version: Description of the Connection Status dialog in Outlook.

They also recommend not saving the meeting as a draft or using autosave:
https://support.microsoft.com/en-us/help/4502145/error-when-delegate-creates-skype-or-teams-meeting-in-outlook