One of my users is having a problem opening Excel attachments. If we click on the attachment from outlook, Excel opens, but there is no worksheet and no data, just a grey Excel window. This happens with ALL Excel attachments, even with no macros.
If we save the file, it opens without issue, as well as any other file saved to the HDD.
I have tried to delete Office temp files, deleted internet temp files, disabled protected view in Excel and in Word trust centers (just in case), have also disabled all add-ins in Excel/Outlook/Word. Macros are disabled also.
After research, someone had said that if they click the File and Open, then cancel buttons the document shows, but this also did not work for us.
There are no error messages, excel does not hang. Any help would be greatly appreciated.