Hello,

In case this is still relevant I may offer my own solution to address this issue which is an add-in called SOS Click whose main purpose is to enable you to save to multiple locations or places in one click. Places can be both local on your computer, on your local network like a file server, NAS and their likes as well as one or more email accounts and multiple cloud services like Dropbox, Google Drive and Microsoft OneDrive. It also features three autosave modes just in case your work is extremely important and you can’t afford losing it. One of these modes allows you to set an auto send to mail mode at a fixed interval. If you set up multiple email accounts then each mailbox will receive a copy of the attachment. It supports Word, Excel and PowerPoint 2007–2021 including Office 365 and works with 64 and 32 bit editions of Windows 7, 10 & 11.
You can find at sos-click.com or you may search for “sos click for microsoft office” on Google or Bing.

Hope this helps.
Liran