Certain EML attachments produce GenericResponseError (9020) response from Office.context.mailbox.item.getAsFileAsync

[lunarwtr]

Provide required information needed to triage your issue

When I attach certain EML files as attachments to a new Outlook mail.

When I try to later use the

    Office.context.mailbox.item.getAsFileAsync({}, (result) => {
      if (result.status === Office.AsyncResultStatus.Succeeded) {
        // ...
      } else {
        console.error(result.error); // ... <---- Will cause error here
      }
    });

I alway get the error condition

{
    "name": "GenericResponseError",
    "message": "An internal error has occurred.",
    "code": 9020
}

Your Environment

• Platform [PC desktop, Mac, iOS, Office on the web]: Office on the Web
• Host [Excel, Word, PowerPoint, etc.]: Outlook
• Office version number: ______
• Operating System: Linux
• Browser (if using Office on the web): Chrome

Expected behavior

Success of the getAsFileAsync call. Our Addin is trying to fetch the EML for mailbox item.

Current behavior

9020 GenericResponseError from officejs api

Steps to reproduce

As mention above

1. I've attached a Red Robin promotion email that seems to cause the problem for me. I've attached it to the ticket as a ZIP file since ticket wouldn't let me attach an EML file type.
2. Create a new email with the test EML as an attachment and send it to yourself (or have someone send it to you).
3. Perform the getAsFileAsync on mailbox item
   test.zip

[Swathy-Mothilal]

Thanks @lunarwtr for reporting this issue. It arises when the EML attachments contain characters outside the Latin1 range.

It has been put in our backlog and unfortunately, we don't have timelines to share at this point.
Internal tracking id: Office: 4941750