CODEWITHSUNDEEP
microsoft-graph-apionedrivemicrosoft-graph-mail
lazyden
lazyden

Reputation: 456

How to create a email with a large attachment in a shared mailbox

I can not upload large (more than 4Mb) attachment to an email created in a shared mailbox using Microsoft Graph. The steps that I followed are documented here but they did not work.

Creating draft (OK):

=> POST /users/[email protected]/mailFolders('drafts')/messages

{ message json }

<= 201

{ message json, id:"XXXX" }

Uploading small attachment (OK):

=> POST /users/[email protected]/messages/XXXX/attachments

{"contentBytes": "BASE64..." }

<= 201 

{ attachment json }

Uploading large attachment (FAIL)

=> POST
/users/[email protected]/messages/XXXX/attachments/createUploadSession

{ AttachmentItem: { attachment json } }

<= 201 

{ upload session json, uploadUrl: "https://outlook.office.com/api/beta/Users('guid@otherguid')/Messages('XXXX')?authtoken=SOME-JWT" }

=> PUT uploadUrl-from-above

attachment-body

<= 403 

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

I have requested the following permissions: user.read, mail.readwrite, mail.send, mail.readwrite.shared, mail.send.shared. And an email with a small attachment is perfectly created in a shared mailbox.

How can I create an email with a large attachment in a shared mailbox via Microsoft Graph?

Upvotes: 1

Views: 282

Answers (2)

lazyden
lazyden

Reputation: 456

The problem is now listed as known issues at the ms docs site.

Upvotes: 0

Marc LaFleur
Marc LaFleur

Reputation: 33124

The createUploadSession endpoint requires one of the following permission scopes: Files.ReadWrite, Files.ReadWrite.All, Sites.ReadWrite.All.

Since this involves another user, I believe you'll need Files.ReadWrite.All since Files.ReadWrite only provides access to your own Drive.

Upvotes: 1

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