There could be many possible reasons that could lead to attachment issues in Outlook. This includes incorrect Outlook settings, file incompatibility, incorrect mail format, etc. Try resetting Outlook ...
Microsoft is working to resolve a known issue that prevents some users from opening Excel email attachments in the new Outlook client.
Microsoft has started looking into a problem that is preventing users from opening some Excel file attachments with non-ASCII ...
You can select any of the above options. If you want to open the file, click Open. As explained above, this is not an error message. It is a warning message which can ...
XDA Developers on MSN
Sorry, the new Outlook app can't open some Excel attachments, says Microsoft
As spotted by Bleeping Computer, Microsoft has published a new service alert related to Outlook. Labelled as issue EX1189359 and titled "Users may be unable to open Excel files attached to email ...
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