I spent about 30 minutes making changes to an email and when exiting the "edit email" window, I was prompted with the following notification:
![0EM50000000RawA.jpg 0EM50000000RawA.jpg](/t5/image/serverpage/image-id/24355i8E836265FAECA2FD/image-size/large?v=v2&px=999)
Apparently someone else was also editing the email (before I started to edit) and therefore all of my changes were lost. Either provide a visual indication that the email is being edited or better yet, prevent multiple users from editing it by "locking" it temporarily until the first user has finished.