I am only able to save the message then drag the saved file. Is there a way to upload directly by dragging from Outlook?
6 Answers, 1 is accepted
Browsers expect only dropped files from the file system, which have a valid path that the browser can apply as a value of the file <input>. Attached files in Outlook do not meet this requirement, unfortunately.
http://stackoverflow.com/questions/17184369/upload-fails-when-user-drags-and-drops-attachement-from-email-client/17197224#17197224
Regards,
Dimo
Telerik

Hi,
I also need to find out how to do this. It's an old topic but it still seems to be an issue.
I've read the articles that state Outlook provides CFSTR_FILECONTENTS & CFSTR_FILEDESCRIPTOR instead of the expected CF_HDROP, however if an email is dropped onto the Google search input field, they manage to pick up at least some info, therefore there must be something passed over.
Is there no way to get this info at least?
I am afraid, that the Upload does not offer the required support. What I could suggest you is to log your idea in our Feedback portal and provide a detailed explanation of the feature, that you think would be useful for the widget. Based on the support it receives from the community, we will decide on whether to proceed with its implementation or not.
Regards,
Veselin Tsvetanov
Progress Telerik

Hi,
OK, since you lads are well versed in JavaScript are there any pointers to where I may be able to look into this?
Thanks.
You may want to start from the following discussions on the topic:
https://social.technet.microsoft.com/Forums/lync/en-US/f55628e6-36ab-444e-bfc0-57df0e323737/drag-and-drop-from-outlook-to-a-browser-based-application?forum=outlook
https://stackoverflow.com/questions/35295522/drag-and-drop-outlook-message-into-browser
Regards,
Dimo
Progress Telerik

In case this helps anyone else. There are a couple of Add-ins for MS outlook that allow this to work. This is not an ideal solution because it isnt a solution that you can embed in your web application.
It has helped us answer the question when it comes up from our users. There are two that I am aware of. I am not endorsing either and have no connection to either. I have tried the second one and it worked for me.
https://www.outlook-drag-drop-to-browser.com/
and
https://www.wilutions.info/ddaddin.html
Thanks
Brian