Azure Microsoft Graph API - How to set From mail address which is not having Mail.Send permission.

shmhs 1

The scenario here is we have a 'domain and mailbox' enabled service account (foocompany) and registered Azure AD application with Mail.Send permission. So, when we are sending mail, the From mail is as foo@mathieu.company .com

but the scenario here is to send mail on behalf of different account i.e from (bar@mathieu.company .com), I hardcoded this but this didn't work.

How can this be achieved , using MS Graph mail.send API? Is there any workaround or hack for this? Attached image for basic reference.

1 answer

Vasil Michev 103.7K Reputation points MVP

2021-06-08T17:31:08.377+00:00

You can grant Send As/Send on behalf permissions (so that the mailbox you are authenticating as, foo@keyman .com, can send on behalf of bar@keyman .com). You can use the Microsoft 365 Admin Center, the Exchange Admin Center or PowerShell to grant the permissions, let me know if you need more details.

If you want to rely on the Graph API completely, you can grant the Mail.Send application permission, which allows you to impersonate (send on behalf of) every user in the organization.
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shmhs 1 Reputation point

2021-06-08T17:56:39.923+00:00

Thanks @Vasil Michev for the reply

I want to rely on the Graph API approach , the (foocompany) is having Mail.Send Delegate permission, as per your suggestion I need to change it to application permission is that right , also would be great if you can share some reference for the same.

Few points
I don't want to see the from mail as Adele Vance on behalf of Pradeep Gupta
but only as Pradeep Gupta. (Is it possible)
Image for reference. Link https://learn.microsoft.com/en-us/graph/outlook-send-mail-from-other-user#send-on-behalf

Vasil Michev 103.7K Reputation points MVP

2021-06-08T18:48:17.203+00:00

Simply use Send As, it's detailed in the same article.

shmhs 1 Reputation point

2021-06-09T06:04:00.09+00:00

Thanks let me try that.

Saurabh Sharma 23,801 Reputation points Microsoft Employee

2021-06-16T19:27:23.88+00:00

@shmhs Please do not forget to "Accept the answer" wherever the information provided helps you to help others in the community.

Thanks
Saurabh
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Azure Microsoft Graph API - How to set From mail address which is not having Mail.Send permission.

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