Use form processing model in Microsoft Flow

[This topic is pre-release documentation and is subject to change.]


Currently, to use AI Builder models in a flow, you must create the flow in a solution. More information: Create a flow in a solution.

Create your flow

  1. Sign in to Microsoft Flow, select the My flows tab, and then select Create from blank.

  2. Search for manually, select Manually trigger a flow in the list of triggers, and then select +Add an input.

  3. Select File and set My Document as input title.

  4. Select + New step, search for Predict, and then select Predict Common Data Service (current Environment) in the list of actions.

  5. Select the form processing model you want to use, and specify the following as Request Payload:

    • For a .jpeg image of the form:

          "base64Encoded": "EXPRESSION",
          "mimeType": "image/jpeg"
    • For a .pdf document of the form:

         "base64Encoded": "EXPRESSION",
        "mimeType": "application/pdf"
    • In the formula bar on the right, replace EXPRESSION with the following expression:


      Replace expression screens


Depending on which connector the file comes from, the expression will need to be enclosed by base64() instead of string().

Test and edit your flow

  1. Select Test on the upper right, select I’ll perform the trigger action, and then select Save & Test.

  2. Import a document that can be processed by your trained form processing model and then select Run flow.

  3. Copy the results to an editor like Visual Studio Code and remove all the " \" characters.

  4. Back on the Flow editor, select + New step, search for Parse JSON, and then select Parse JSON – Data Operations from the list of actions.

    Parse JSON screens

  5. In the Parse JSON screen, next to Content, select Response Payload.

  6. Select Use sample payload to generate schema link, paste the output from your test, and then select Done.

  7. Copy the generated schema, paste it into an editor like Visual Studio Code, replace all instances of integer with number, and then copy the modified schema back into the Parse JSON screen in Microsoft Flow.

    Visual Studio  screen

    Paste schema

Use form processing model output in Microsoft Flow

Now you can use the output of the form processing model in subsequent actions in Microsoft Flow.

For example, to retrieve the value of a field named Total, you would use the following expression:


To iterate over tables, put the entries value on an Apply to each' loop. To access the value of a column named Amount—for instance, inside the table—use the expression:


Congratulations! You have created a flow that leverages an AI Builder form processing model. Select Save on the top right, and then select Test to try out your flow.

Form processing model overview