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Create Note with attachment from binary file content

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Posted on by LP-15050648-0

Hello everyone,

I'm currently working on a Power Automate flow where I receive an attachment from Copilot Studio and would like to add it to a note in Microsoft Dynamics. The attachment is passed to Power Automate via a contentUrl and converted from JSON to in binary format.

Unfortunately, I'm unable to use the binary content directly when creating the note, and I'm also unable to convert it to Base64. Additionally, using SharePoint to create the file isn't an option, as doing so breaks the Copilot-to-Automate handoff.

Has anyone successfully managed to convert a binary file from a contentUrl into a format that can be used as an attachment in a Dynamics note—without relying on SharePoint?

Any insights or alternative approaches would be greatly appreciated!

Best regards,

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Dynamics 365 general

2025-07-09 12_23_...

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André Arnaud de Cal... 301,020 Super User 2025 Season 2 on at

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Can you tell us what Dynamics 365 application this question is related to? There are several different solutions in the Dynamics 365 family, like: Sales, Finance, Supply Chain Management, Project Operations, and Business Central.

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LP-15050648-0 67 on at

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Dynamics Sales

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Ravitheja J 6 on at

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Hi, did you try extracting the base64 content from the contentUrl?

You can convert the contentUrl to JSON by using Parse JSON action, and then try using an expression similar to split(jsonvariable('contentUrl'),',')[1] to extract the base64 content.

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DAnny3211 11,397 on at

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Hi there,

This is a common challenge when working with binary content from contentUrl in Power Automate, especially when integrating with Dynamics 365 Notes.

Here’s a possible approach that avoids using SharePoint:

Use HTTP Get to Retrieve the File:

Use the HTTP action in Power Automate to fetch the file from the contentUrl.

Ensure the response is set to return binary content.

Convert Binary to Base64:

Use the base64() expression in Power Automate to convert the binary content:

base64(body('HTTP'))

This will give you a Base64 string that can be used in the Dynamics 365 Create Note action.

Create Note with Attachment:

Use the Dataverse Create a new row action for the Annotation table.

Populate the following fields:

Subject: Your note title

Document Body: The Base64 string

File Name: Name of the attachment

Mime Type: e.g., application/pdf or image/png

Regarding: Link to the related record

Make sure your flow has the necessary permissions to access the file and create records in Dataverse.

Let me know if you'd like help building the flow or troubleshooting the conversion!

Please verify if this response was helpful.

Best regards!

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