- OS: Windows 7
- Browser: N/A
- Office: 2007-2016
- Product: N/A
In Outlook, if you open an attachment, edit it, then hit the Save button, your edits will be saved to a temporary folder.
In Windows 7 this folder is located at:
"C:\Users\<USER>\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.Outlook\"
Here you will see some subfolders that contain attachments that are opened from Outlook messages.