Some Internet Message Headers are not returning when retrieving Item Attachment content

[piyumi25]

Describe the bug I have a requirement to get all internet message headers belongs to an item attachment attached to an Outlook message. I have used following Graph API call to read item attachment content. https://docs.microsoft.com/en-us/graph/api/attachment-get?view=graph-rest-1.0&tabs=http#example-3-expand-and-get-the-properties-of-the-item-attached-to-a-message I was able to get some internet message headers, but not all the headers of the item attachment.

I found this link https://stackoverflow.com/questions/60947499/get-message-using-graph-missing-some-internetmessageheaders explains about how to get missing internet message headers. but I got "Bad Request" error in my case.

To Reproduce Steps to reproduce the behavior:

1. Go to 'MS Graph Explorer'
2. Try to retrieve item attachment content using /messages/message-id/attachments/attachment-id/?$expand=microsoft.graph.itemattachment/item
3. Double check with using MHA or File=>properties=>internet message headers in Outlook Desktop
4. You can see some missing headers

Expected behavior Should be able to see all headers

Screenshots If applicable, add screenshots to help explain your problem. var itemAttachment = await graphServiceClient.Users["11805967-f79a-4e1e-aac9-08bca571dd9f"] .Messages[messageId] .Attachments[messageWithItemAttachment[0].Id] .Request() .Expand($"microsoft.graph.itemAttachment/item") .GetAsync(); var item = itemAttachment.GetType().GetProperty("Item")?.GetValue(itemAttachment, null) as Microsoft.Graph.Message; Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context Add any other context about the problem here.

[MIchaelMainer]

I've inquired about this issue. Let me see if I can get more information.

[hemakaranth]

We are hitting the same issue. Any updates ?

[andrueastman]

Hey @hemakaranth and @piyumi25,

Any chance this is still an issue? From our end comparing the internet headers from outlook and the graph response yield the same results now when checking a message or whether it's an attachment.

[ghost]

This issue has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for 4 days. It will be closed if no further activity occurs within 3 days of this comment.

[erSitzt]

Hi, is this still an issue ? Can anyone confirm if this happens all the time or if it is an intermittent issue and if this is only related to attachments and dotnet?

I'm using the X-MS-Exchange-Generated-Message-Source: Antispam Quarantine Agent header in Redmine to identify mails that have an Auto-Submitted: auto-generated header, but should still be processed as they were released from quarantine by a user...

This seems to work most of the time, but sometimes the header is just missing (accessing msgraph from redmine/ruby). Checking the mail in Outlook i can verify they exist.