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Have you found a solution fo this?
How can I generate a draft email (programmatically) to be opened in compose mode with New Outlook
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MC Dev
30
Reputation points
We frequently make use of systems generating an "EML" file and then use Outlook to open it. This presents the behavior of opening a draft email window with Outlook that then lets our users add content to the drafted email, adjust the recipients and then send the email through Outlook.
With New Outlook it appears support for this behavior with EML files isn't there. It only opens EML files in a "view" mode, instead of a draft or compose mode.
Is there an alternative way to create a draft email file that can then be opened in New Outlook, in the same manner a newly composed email would appear when created from within New Outlook?
Microsoft 365 and Office Development Other
Outlook Windows Classic Outlook for Windows For business
9,585 questions
{count} votes
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Nick Giammatteo 0 Reputation points2024-04-11T21:04:18.42+00:00 I had the same question as you and spent a couple hours trying to get this to work on both desktop and mobile devices and I think this could solve your issue. I have not done a lot of testing on this but I may forget to come back and share so am adding it now.
This is in C# and the url will open the draft email in edit mode.
var OutlookDraftUrlFormat = "https://outlook.office.com";
var OutlookDraftDeepLinkUrlFormat = "/mail/compose/{0}";var id = HttpUtility.UrlEncode(response.Id).Replace("-", "%2F").Replace("_", "%2B");var url = string.Format(OutlookDraftUrlFormat + OutlookDraftDeepLinkUrlFormat, id); -
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Jonas Petraška 30 Reputation points2024-04-12T20:40:41.6033333+00:00 @Nick Giammatteo can you please clarify how can this be used in an .EML file? Thank you.
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