I have been looking at customizing the 'Appointment' form in CRM 2013, however now it appears that whenever I open the form to edit it (any of them), I get an exception and cannot edit the form at all because of this!
Have tried restoring the entity from a backup but am still getting the same thing! :-(
Has anyone ever experienced this before or had a similar issue and found a way to resolve this?
Thanks in advance.
Jim