"The operation cannot be performed because the item has changed" error when a delegate creates a Skype or Teams meeting in Outlook

Applies to: Outlook 2016

Symptoms


Consider the following scenario:

  • You are working in Cached mode in Microsoft Outlook.
  • You are granted delegate permission for another user’s calendar.
  • In the other user’s calendar, you create a meeting request, and then add users to the meeting through Scheduling Assistant.
  • You type meeting details in the request, and you wait for the request to be autosaved to the Drafts folder.
  • You add Skype or Teams meeting by clicking New Skype Meeting or New Teams Meeting on the ribbon.
  • You click Send to send the meeting invitation after the draft was potentially opened for several hours.

In this scenario, you may receive an error message that resembles the following: 

4502145-1

Additionally, you may be aware that the meeting isn’t displayed on the delegator’s calendar. However, the meeting invitation is successfully delivered to the attendees.

Note Using third-party conferencing add-ins instead of the native New Skype Meeting and New Teams Meeting commands could also cause this issue to occur.

Cause


The message is not saved because of a conflict between the meeting information that is stored in memory and the meeting information that is in the local cached copy. Outlook has a built-in feature to automatically save messages to Drafts after 3 minutes.

Outlook splits meeting processing into two parts:

  • Saving the meeting
  • Sending the meeting invitation

In this situation, sending the meeting is successful, but saving the meeting fails.

Workaround


To work around this issue avoid saving the meeting before sending it. You should also turn off the Outlook Autosave feature or increase the delay time before messages are autosaved.

To set the Autosave feature, follow these steps:

  1. Go to File > Options > Mail.
  2. In the Save Messages section, either clear the Automatically save check box or increase the amount of delay time before items are autosaved into Drafts.

The value range for AutoSave is from 1 minute to 99 minutes. Consider increasing the value to 10 minutes or more to allow more time to modify the meeting contents.

autosave

Additionally, delegates can consider using Outlook on the Web (OWA) to create meetings. OWA isn't affected by this problem.

Status


A fix for this issue is being developed.