Can I send mail on behalf of user using graph API with App only permissions

Question

Can I send mail on behalf of user using graph API with App only permissions

Naga Dheeraj M 20

Can I send mail on behalf of user using graph API with App only permissions?

I get this error.

{
    "error": {
        "code": "ErrorAccessDenied",
        "message": "Access is denied. Check credentials and try again."
    }
}

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Answer 1

Achraf Ben Alaya 1,401 MVP

Hi ,

Yes, you can utilize the Microsoft Graph API with Application permissions to send mail on behalf of a user.

Please check : https://learn.microsoft.com/en-us/graph/auth-v2-user?%3Fwt.mc_id=MVP_328341&tabs=http

I hope you found this helpful.

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Answer 2

CarlZhao-MSFT 46,456

Hi @Naga Dheeraj M

Yes, you can certainly use application permissions to send messages on behalf of other users.

First, you need to make sure you have granted the Mail.Send application permission to the calling app and granted administrator consent for that permission. Next, you need to request an access token using the daemon-based client credentials flow and call the POST /users/{id}/sendMail endpoint (note, not the POST /me/sendMail endpoint).

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Hope this helps.

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Naga Dheeraj M 20 Reputation points

2024-03-12T03:55:41.0033333+00:00

Thank you. Also, Admin consent was required along with adding this permission.
CarlZhao-MSFT 46,456 Reputation points

2024-03-12T05:34:44.9966667+00:00

Hi @Naga Dheeraj M

Yes, like I said in my answer, application permissions are tenant-wide and require administrator consent.

--please don't forget to Accept as answer if the reply is helpful--

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Can I send mail on behalf of user using graph API with App only permissions

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