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Need Help with (New designer) Power Automate Error - 'Send_an_HTTP_request' failed:

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Posted on by CU27040838-9

I’m working on automating a process in Power Automate to create individual emails for different markets. Each market has its own set of recipients and a specific attachment, but the email body remains the same across all.

Instead of sending these emails out directly, I want them to be saved in the Drafts folder — either in my own Outlook mailbox or a shared mailbox — so I can review and send them manually.

I’ve created a flow that loops through the data and generates emails, but I’m running into the following error:

I’ve tried two approaches, but I’m still facing issues. The main problem seems to be with the Select_To value mapping — I’m unable to get the correct structure for the toRecipients field.

Here's what’s happening:

When I try using a JSON expression inside Select_To, I get the error: "Apply_to_each contains invalid expression(s)"
When I try using just item() inside the value, I get: "Action 'Send_an_HTTP_request' failed: Property toRecipients in payload has a value that does not match schema."

The rest of the flow runs fine — it’s just the Select_To that’s not formatting the output the way the Graph API expects.

I’ve attached the code view for both the Apply to each and HTTP actions below. Would really appreciate any suggestions or tweaks you might have to get the mapping right.

Thanks in advance!

code view HTTP.txt

Code view-Apply t...

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Expiscornovus 33,876 Most Valuable Professional on at

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Hi @Community member,

Based on your Select action configuration the format of your Recipients looks like the below, is that correct?

"toRecipients":[ { "emailAddress": "AdeleV@contoso.com" } ]

However, like you mentioned the format needs to be the below:

https://learn.microsoft.com/en-us/graph/api/user-post-messages?view=graph-rest-1.0&tabs=http#request

So, you would need to add a nested property called address. You can use for example concat & json functions.

"toRecipients":[ { "emailAddress":{ "address":"AdeleV@contoso.com" } } ]

Below is an example

json(concat('{"address":"', item(), '"}'))

Test result

Happy to help out 😁

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Vaish123 136 on at

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Instead of this :

"Select_To": {
"type": "Select",
"inputs": {
"from": "@outputs('Compose_To')",
"select": {
"emailaddress": "@{item()}"
}
},

use :

"Select_To": {
"type": "Select",
"inputs": {
"from": "@outputs('Compose_To')",
"select": {
"emailAddress":
{
"address": "@{item()}"
}
},

Update similar code for Select_Cc

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