Solved Restore delete confirmation dialogue for online only files?

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQVl03n-jUzMX4Sll4JzfRttLr1Fz2j5IgO6Q&s

I was browsing files in file explorer, connected to my Synology nas via Synology Drive, and I was cleaning up a few files when I ticked the "don't ask me again" checkbox in the above image. I cannot figure out how to undo this and get the confirmation dialogue back for online only files.

I've tried all three steps in this post (Enable or Disable Delete to Recycle Bin Confirmation Dialog in Windows 11) and the OneDrive solution below, but nothing. It all seems to be for the default dialogue, not the online only one. Any advice would be greatly appreciated, cheers!

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\OneDrive]
"FirstDeleteDialogsShown"=dword:00000000

Click to expand...

That warning prompt can apparently be reinstated with this registry edit:

Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\SyncRootManager
Find the key DoNotShowAgain and set it to 0.

Warning message when you delete a synced online-only OneDrive file

Click to expand...

Absolute legend, it worked. Thank you!

New tutorial just for you.