.I use 'Outlook on the web for business (Office 365)'. i access it both on a wired desktop and a laptop using wifi.
There are no error messages. The attachments are simply not there.
I haven't tried anything yet as I couldn't find an answer under the help files!
Can you alsotell me if messages 'disappear' once i are close to our storage limit please? i seem to be losing them. I wonder if I have inadvertently deleted them myself? If I press delete on an individual email using the right hand drop down arrow next to the 'Reply Al' button, does it delete just that individual one, or the whole conversation? Ditto when I press the 'bin' icon in the 'Inbox' pane?
Moved from: Email / Restore or recover messages
I had the same issue, and one work around is to:
Click on New message, Attach, Browse cloud locations, Recent attachments, and scroll the list until you find the one you're missing.
It seems that saving attachments to the cloud is a default feature in the Outlook app, so hopefully it was saved there.
Hope this helps!