Verified Win 10 64bit had latest updates.ģ. Verified Office 2016 had latest updates.Ģ. I have conducted the following resolution steps.ġ.
All drivers and peripherals working, so I don't think that is the problem. About 3 days before upgrading to Office 2016 I upgraded from Win 7 Pro 64-bit to Win 10. I am a power user, so I have good computer knowledge. There have been more than half a dozen recipients using various versions of Windows and Office that have seen this problem from my emails, so I know it is When I forwarded an email to myself originally sent from Outlook 2016, the same file would not open. When I reverted back to 2013 everything worked properly. The last and final solution from MS was to revert back to Office 2013, which I did. I have spoken with three tech support people at Microsoft with no idea on what was causing the problem. I conductedĪn Office 2016 repair and have reinstalled Office 2016. I can open all the files on my desktop, but if I send myself an email with the attachment, it will not open per the error message stated above. The attachments have been from files on both my OneDrive and on my desktop. PDFs either do not show upĪs attachments or will not open. To open the attachment the recipient gets the error message stating the file is invalid, has the wrong extension or is corrupted (various wordings depending on whether it is Excel, Word or PPT, but essentially the same message). Attachments have all been Excel, Word, PowerPoint and PDFs. Everything appeared to work properly, but now when I send attachments via Outlook, most of the recipients cannot either see them or open them. I recently upgraded to Office 2016 (365).