Situation: The client get this message when sending email in the Outlook 2013: “The operation cannot be performed because the message has changed” in Outlook
Troubleshooting:
- Disable “When a reply modifies a message, don’t move the original” by going to Options > Mail > Conversation Clean Up > and uncheck “When a reply modifies a message, don’t move the original.”
2. Restart Outlook.
3. We fixed this problem in Outlook 2016 by removing the Outlook add-in included with
the installation of Adobe Acrobat DC ” Adobe Send & Track for Microsoft Outlook – Acrobat”. In Programs & Features, select Adobe Acrobat, and Change, then remove the Outlook portion of the installation (or you can user-by-user disable the above add-in in Outlook).
4. Run Outlook repair.