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outlookexchangewebservicesoffice-jsoutlook-addinoutlook-web-addins

Downloading Email body and attchments in .MSG format in Web Outlook

Is it possible to download email body and attachments in a file in .MSG format in Outlook Web? I am working on an Outlook 365 Web addin and I require to download entire message along with attachments in .MSG format?

Edit: Is there any open source library in .NET which does the same?

Thanks,

Solution

  • I have to do the same thing, but since the company I'm writting the addin for is using a version of Windows/MSOffice where the webview that the addin runs inside is handled by a IE11 process, I got OOM-error when trying to download an attachment bigger than 7MB via a EWS request (using the ews-javascript-api).

    Now I'm using a IIS server to which I send the eschangeToken and EmailId and handle the download/upload of the email there via EWS-managed-api from MS.

    Downloading the email as .MSG is not possible AFAIK, I download them by getting the MIME-content of the email and saving it as an .EML file.

    Here MS provides some examples on how to use the ews-managed-api.