Having the same issue. Seems size of attachment matters. No problem with web download at all.
Windows 10 Mail Attachments - Download Failed
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Anonymous
I am synching my outlook.com email across my desktop, tablet and windows phone. Over the past 3 weeks, the Windows 10 Mail app on each device shows the majority of (but not all) attachments as "Download Failed".
The attachments failing include, jpeg, pdf, docx, xlsx etc.
I am able to download the attachments manually from outlook.com.
It is not antivirus or firewall related, as I am running different options on the different devices.
Are others experiencing this issue and are there any known solutions.
***Post moved by the moderator to the appropriate forum category.***
Windows for home | Other | Email and communications
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Anonymous
2017-01-13T09:54:24+00:00 -
Anonymous
2017-01-12T15:22:53+00:00 I am having the same problem.
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Anonymous
2016-06-08T06:15:23+00:00 Another 8 months gone by and the problem persists... Currently the W10 Mail App shows "Download failed" for a pdf. Accessing the Exchange server through OWA, I can download the attachment just fine. The standard W10 email app really is awful...