I have a client using Outlook 2013 that is having an issue with attachments. This issue is not consistent, but sometimes the attachment she sends seem to get corrupted and are unable to be opened by the receipent. When this user goes into her Sent Items in Outlook 2013, the attachments corrupt in the Sent email as well. She sent me an email with 2 files in it, one Excel File that cannot be opened, it says" File Format is not valid" and a Word Doc that just opens with a File Conversion Box that says "Select the encoding that makes your document readable"
We initially thought the issue was with the client she was sending it to, but it appears to even be corrupted in her Sent Items as well, so it is being delivered unreadable. The Excel File is 1MB and the Word Doc is 476KB, just as an FYI.
Any thoughts would be appreciated.