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 ...

If you cannot open the Excel file from its location, simply open any Excel file and click the File tab. Then, go to Open > Browse and select the file giving error ...

The cause appears to be the use of non-ASCII characters in file names. Microsoft describes it like so: “Any user may be ...

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 ...

If you see the “The file couldn’t open in protected view” error while opening Microsoft Excel, the solutions listed in this post may help you resolve the issue ...