Note that most of the forum threads are reviewed by Telerik representatives and sometimes we address the questions asked by our customers in the forums as well. However, a post in the forum doesn't guarantee you a response from the Telerik support team. Moreover, threads are handled according to license and time of posting, so if it is an urgent problem, we suggest you use a support ticket, which would be handled before a forum thread. Thank you for your understanding.
As to the custom fields in appointments, please refer to the following help article which is quite useful on this topic: https://docs.telerik.com/devtools/winforms/controls/scheduler/appointments-and-dialogs/adding-a-custom-field-to-the-editappointment-dialog
I hope this information helps.
Dess | Tech Support Engineer, Sr.
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