Is it possible to add a custom Cloud file service (like OneDrive/Dropbox) to Outlook.com (Office 365) - outlook-addin

Question

I've seen that when you add an Attachment in Outlook, you can automaticly add an attachment from a cloud service.
Is there a possible way to add a custom entry to this list?

Answer 1

I offer to you to use OneDrive file picker , with this you can simply add button to your add-in html and then it's open the log-in page and after user is log-in he could choose the files from one drive.
The steps wrote in the link but I write the main steps here:
1.register your app in Microsoft Application Registration Portal .
2.Add the js refrence in your js file of your add-in:
<script type="text/javascript" src="https://js.live.net/v7.0/OneDrive.js">
</script>
3.Add button to your add-in html page:
<button class="oneDriveButton" id="btnOneDrive" ><img src="https://js.live.net/v5.0/images/SkyDrivePicker/SkyDriveIcon_white.png" style="margin-right: 10px; height: 20px;">Open from OneDrive</button>
4.In your js file of add-in open the picker:
$('#btnOneDrive').click(function () {
var odOptions = {
clientId: "your client id from your app registration ",
action: "download",
multiSelect: true,
openInNewWindow: true,
linkType: "query",
advanced: { redirectUri: "your redirect uri from app registration" },
success: function (files) {
},
cancel: function () { /* cancel handler */
},
error: function (e) { /* error handler */
}
};
OneDrive.open(odOptions); });
Put attention:
Your clientId and your redirectUri must be equal to this you
set when you register your app in the first step.
You could change the option by what you want ,look here under
picker options .
Thats all , you get the files in sucess handler function and you could do whatever you want with them.
Good luck!