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Microsoft Dynamics 365 | Integration, Dataverse...
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Field Service Time Entry Type - Are Custom Choice Values Officially Supported?

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We are working with Dynamics 365 Field Service and noticed something confusing regarding the Time Entry Type field (msdyn_timeentry.msdyn_type).

The field uses the global choice:
msdyn_timeentrytype

Using standard Dataverse customization, we are able to:

  • Edit the global choice
  • Add new custom values
  • Publish successfully
  • See the new values appear correctly in forms and dropdowns

However, when attempting to change the status to "Submitted" or "Approved" a Time Entry record using one of the newly added values, the save fails with a managed Field Service plugin error:

Field Service: Update (pre-operation) for msdyn_timeentry
ApiExceptionMessageName: InvalidArgument

The exception comes from:
Microsoft.Dynamics.FieldService.FieldServicePlugin

Questions:

  1. Is msdyn_timeentrytype officially extensible for custom values?
  2. If custom values are not supported, is this documented anywhere?
  3. Why does Dataverse allow extending the choice and publishing values if the managed Field Service logic rejects them at runtime?
  4. Is there an additional registration/configuration step required for Field Service to recognize new values?

We are trying to understand whether:

  • this is unsupported by design,
  • there is a missing configuration step,
  • or this is a product/documentation gap.

Any clarification from Microsoft or others who have implemented this successfully would be appreciated.

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