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Adding an Attachment to an Approval Email In Flow

You should be able to attach a document to an approval email using flow. 

Status: Started

We are now working on the functionality to attach files to Approval requests.

Power Automate Staff


Could you please provide the url of the flow run where you are hitting this issue so that I can investigate for you?


The known issues I am currently working on fixing:

  • Files with empty content causes sending approval emails to fail to a limitation with the internal emailing service.
  • Approval actions don't display the proper failure message when creating approvals with attachments that are banned by the Common Data Service configuration.
Level: Powered On

sure @TCambs


The issue is found in "Start and wait for an approval 2" in the "yes" side of the final decision action.


It runs, approver is able to see attachments in approval center and approve, but the approval does not move forward.


Thanks for taking a look into this!

Level: Powered On

@TCambs  the attachments are being pulled from a SharePoint list that is populated by a PowerApp.  Not sure if that makes any difference, but thought I'd point that out.

Power Automate Staff


Looks like a regression, I can reproduce the problem. It's failing for a size over 8MB (for a reason unrelated to any limits). I will work on a fix along side the other known issues immediately. Thank you for bringing this to my attention.

Level: Powered On

Thanks @TCambs, I really appreciate your help!


Would you be able to give me an update once this is finished?


How long do you think this update will take to complete?



Power Automate Staff



I will update to confirm the ETA but the current estimate is that it will go out with our first deployment of the year which means it should be everywhere by Monday Jan 20th 2020.

Level: Powered On

Thanks again @TCambs!

Level: Powered On



Any update on this?



Level: Powered On

I am having an issue with this again.  I have two different Flows set up which do basically the same thing, in the first one the attachment array is built and sends an email with attachments as intended.  The second flow is not working even though I have set them up exactly the same.


On the Send an Email (V2) I am being given the error; 

"status": 400,
"message": "No input parameters provided. Please provide required input parameters 'To', 'Subject' and 'Body'.\r\nclientRequestId: e31ba399-f859-416d-85eb-29a3f8ae4c13",
"error": {
"message": "No input parameters provided. Please provide required input parameters 'To', 'Subject' and 'Body'."
"source": ""
The link to the broken flow is as follows;
I have clicked Download on the Inputs field on Send an Email and can clearly see input parameters exist;

The working flow;
I can't figure out why this isn't working correctly in one Flow and not in the other.