The cause appears to be the use of non-ASCII characters in file names. Microsoft describes it like so: “Any user may be unable to open Excel files attached to email messages in the new Outlook client ...
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 ...
Microsoft has started looking into a problem that is preventing users from opening some Excel file attachments with non-ASCII file ...
Here, in this section of the post, we will recommend the five most effective tools and methods to repair the Excel file. Microsoft Excel’s Native Repairing Feature Online File Repair Service Recovery ...
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