Send multiple attachments from multiple forms questions

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Posted on by CU02101531-0

Hi,

I have a MS Form that has 2 questions with the option to add back up documents.

Below is the current test flow that works to the point of try to attach the documents that are in two difference sources:

1) One Drive -Files

2) Share Point - Attachments

When I add both Files an Attachments into the Attachments field I get the following error:

Flow save failed with code 'OpenApiOperationParameterValidationFailed' and message 'Input parameter 'emailMessage' validation failed in workflow operation 'Send_an_email_(V2)': The parameter with value '"@{variables('Attachments')}@{variables('files')}"' in path 'emailMessage/Attachments' with type/format 'String' is not convertible to type/format 'Array'.'.

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MtryDoc 55 on at

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Hello and Hope this helps. I am running into a issue with this also. I have it working on one flow but my when I repeat steps on another flow I am gettting a error.

Looking at what you supplied here are my suggestions. Make sure that both the Attachments and files are array and not string. Then I would create a new array and combine both attachment and Files together.as one array then you should be able to pass that array in the email attachments.

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Ellis Karim 12,059 Super User 2026 Season 1 on at

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Please see if the following are of help:

How to Send Microsoft Forms File Uploads from Multiple Questions to an Approval Workflow Using Power Automate – Ellis Karim's Blog

Note: You will need to change the structure of the Append to Array action for Emails, see below:

📝Best Practices for Formatting File Attachment Arrays in Approvals, Outlook Emails, OneDrive, and SharePoint – Ellis Karim's Blog

Ellis

Ellis Karim's Blog – IT doesn't have to be complicated!

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