In Dynamics 365 Customer Insights – Journeys, when creating a Custom Trigger, attributes can only be defined by selecting a data type (Text, Number, Lookup, etc.).

Currently, there is no capability to mark attributes as Mandatory or Optional. This limitation makes it difficult to enforce data validation and consistency when the trigger is invoked from Power Automate, plugins, or external integrations.

Additionally, Option Set (Choice) data type is not supported for custom trigger attributes. This restricts the ability to pass controlled or predefined values, often forcing workarounds such as using free-text fields, which can lead to invalid or inconsistent data.

Expected / Desired Functionality

• Ability to mark custom trigger attributes as Mandatory or Optional
• Built-in validation to prevent trigger execution when mandatory attributes are missing
• Support for Option Set (Choice) data type in custom trigger attributes
• Optionally, allow default values for optional attributes