Hi lawilliams713,
Specifying dynamic values from out of the box entities is pretty simple but there are some instances when we might want to add dynamic values from custom entities. To which we don’t have any straight forward approach in CRM as we cannot add custom entity in email template.
As you mentioned, “On the entity form there is a lookup field called Event Name that looks to the custom Event entity.”
If you want to add lookup value, you need use following synax:
{!EntityLogicalName:FieldLogicalName/@name;}
For more details, you can refer following link:
(+) Insert dynamic values in Email Templates from Custom Entities - Microsoft Dynamics 365 Community
Firstly, you need check the logic name for the entity and field.
Then you need ensure that regarding field is filled with Event Scheduling value, and lookup field--Event Name that in the Event Scheduling entity is not null.
Regards,
Leah Ju
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