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Document Intelligence generates an Authorization Mismatch error when creating a project.

AaronMorrison-4343 0 Reputation points
2025-10-24T05:47:21.02+00:00

On creation of a Custom Extraction Model Document Intelligence Project in Document Intelligence studio, when creation of the project occurs it generates an error of AuthorizationPermissionMismatch. System Managed Identity is used in Document Intelligence and assigned contributor access to the storage account used with the model. RBAC has been validated and roles are assigned to storage account. Also added Storage Blob Data Contributor, validated CORS rules and signed out / signed in to refresh access tokens and confirm correct tenant use.

Error continues to occur after sign out / sign in and every action in Document Intelligence project.

Azure AI Document Intelligence

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  1. Aryan Parashar 1,850 Reputation points Microsoft External Staff Moderator
    2025-10-24T09:51:59.3766667+00:00

    Hi Aaron,
    You are right in your error mitigation steps.

    Make sure of the following:
    Assign the correct role to the blob storage, and ensure the blob resource is properly configured. Here is the relevant documentation:
    https://free.blessedness.top/en-us/azure/storage/blobs/assign-azure-role-data-access?tabs=portal#determine-resource-scope

    Since you've already enabled CORS, check it again.
    User's image

    You can also check for failures by going to:

    Storage account → Monitoring → Insights
    User's image

    The error you're facing is likely due to managed identity permissions. Make sure to check the roles using the Azure Portal, as shown below.
    User's image

    Feel free to accept this as an answer.
    Thankyou for reaching out to The Microsoft QNA Portal.

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