Using the backup on logoff and shutdowen after successful backup sounds like a nice workaround... But: you are referring Endpoint as a product mainly for end users. We all know that only very very few people out there, so called "end users", have never heard of Veeam
and you state that the product needs to be kept simple for those end users. I don't think its simple to tell the user he has to log off in order to shutdown his computer after work is done. This sounds simple.... but all of us have been trained since Win95 to use the shut down option in order to shut down the computer. And now there is Endpoint... "please log off to shutdown". Simple said. As I know from my first days, when working with end users, there is will be no understanding why the should now log off instead of shutdown. Even if the understand it, they will forget about it after two days and continue clicking on shutdown to shutdown
Once I opened a support case for this and the supporter told me it has to do something with keeping the needed services running, while system tries to shut down everything (case # 00888385). What I don't understand is why software like Acronis TrueImage is able to keep the needed services running and start backup on shutdown event?!
The statement of g7cnp of starting a backup "in the middle of something" when a restart was initiated rather than a shutdown could lead to bit frustration, this is true. But how often does the normal end user restart his computer "in the middle of something"?
Another approach to work whith this could be to display a message "press any key within 10 seconds, or automatic backup will start". The same procedure as automatic start of chkdsk during startup if filesystem seems not clean. <<-- This would be a really great one! I have installed Endpoint on about 50 clients from our customers now, and nearly all of them looked a bit confused when I told them that Endpoint is not able to start backup on shutdown event. They all know this is technical possible, as most of them know Acronis TrueImage from former days