I am getting the following message:
The custom form cannot be opened. Outlook will use an Outlook form instead. The form required to view this message cannot be displayed. Contact your administrator.
This is usually happens when i view a Sent email for the Calendar sync to me cell phone. I have tried to fix this with the standard methods of resetting the Forms and / or deleting the Form cache. This does not fix the problem for long.
How can this be fixed?