https://issues.kolab.org/show_bug.cgi?id=5284
- User 1 create event serie and invide attendee User 2
- User 2 get email in Windows FAT Client and open it
- User 2 chose "Bedint annehmen" a dialog open to add an comment (add comment an click Button OK)
- Error dialog open - see attachment(missing dialog to suggest a counterproposal)
Email will not be sent back to user 1
"Fehler: Fehler beim Bearbeiten des Ereignisses"