Dual Write Error “Failed to authenticate” and “Unable to get access token

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Posted on by KM-20021906-0

Hello,

I’m trying to write data to the entity msdyn_functionallocations in Dynamics 365, but I keep getting the following error:

Unable to write data to entity msdyn_functionallocations.
Authentication failed with error: Failed to authenticate for <environment URL>/api/data/v9.0/msdyn_functionallocations.
Unable to get access token for <environment URL>/api/data/v9.0/msdyn_functionallocations.
For troubleshooting see https://go.microsoft.com/fwlink/?linkid=2244045

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Power Platform integration

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André Arnaud de Cal... 298,578 Super User 2025 Season 2 on at

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Dual Write Error “Failed to authenticate” and “Unable to get access token

Hi,

Was this working before or is this a new environment? Have you checked the health on the Dual Write setup page? Is it working for other entities? If so, table permissions on Dataverse might be missing.

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