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Graph API HTTP Request - Update message - Set subject of draft email (failed statuscode 400)

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Posted on by beginetienne

Hi !

I am having trouble setting the subject of a draft email created by another http request in Flow. The "update message" HTTP request is returning status code 400 and I cannot figure it out. Does anyone have any pointers?

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beginetienne 8 on at

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I've reduced the flow to only the update message api call and hardcoding the messageID

I've double checked the ID using the webLink URL provided by the createreplydraft call in the example above.

I still get error 400. Could this be a permission issue? The message does have isdraft:true. So I should be allowed to update it!

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beginetienne 8 on at

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One more finding, the get message API call works for that messageID.

Update Message (fails)
{
"Uri": "https://graph.microsoft.com/v1.0/me/messages/AAMkAGZjZjZkM2I2LTljMTctNDhjMy1iNjBlLTIwZDBhMDVmNjUxZABGAAAAAABiNIb03MPiR5A8XwnvWMsTBwBofBcqEsIPQp0LDJ6FVo5rAAAAAAEPAABofBcqEsIPQp0LDJ6FVo5rAACNNU44AAA=",
"Method": "PATCH",
"Body": "{\n \"subject\": \"TEST\",\n \"body\": {\n \"contentType\": \"\",\n \"content\": \"content-value\"\n },\n \"inferenceClassification\": \"other\"\n}",
"ContentType": "application/json"
}

Get Message (works)
{
"Uri": "https://graph.microsoft.com/v1.0/me/messages/AAMkAGZjZjZkM2I2LTljMTctNDhjMy1iNjBlLTIwZDBhMDVmNjUxZABGAAAAAABiNIb03MPiR5A8XwnvWMsTBwBofBcqEsIPQp0LDJ6FVo5rAAAAAAEPAABofBcqEsIPQp0LDJ6FVo5rAACNNU44AAA=",
"Method": "GET",
"ContentType": "application/json"
}

Not sure if this is of any help!

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Verified answer

VictorIvanidze 13,073 on at

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As you don't need to modify the message body, remove the "Body":{} part completely.
Also, setting the "inferenceClassification" is useless for drafts.
Run Graph Explorer and play a bit with PATCH request.

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beginetienne 8 on at

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I’ve changed the json to include only the subject, and the request was successful. Thanks !

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