OK, so I installed WD Sync on my Mac and added some folders to sync to MyCloud. As we know, it also creates a My Cloud folder on your device. So adding an item there will sync to the WD Sync folder. So far, so go.
Now I decided to share this item via email within WD Sync app and when it was delivered, the From Email address was for a different user on my NAS. In fact, its the first alphabetical user. This is not good.
WD - please fix.