Does not have an end date: This error indicates that the calendar item has an invalid end date. This typically happens for old appointments which have become corrupted, or for appointments which were incorrectly created by a third-party application (sync or CRM application, for example).
We recommend the following:
- Log the subject of failed items.
- Retry failed items (subjects will be logged).
- Review error logs to identify the offending calendar items.
- Fix the start/end date (open and save each calendar item).