I tried extensively for two years to modify the verbiage in the email notifications to clients as it is not clear and frankly frightens them. But even though I could change the wording of the body by editting the html, I could not get the subject line/ status to appear the way it does with the default.
Yet no one at MSP360 would work with me to get the custom email notifications to work the way I wanted.
Maybe I will send in another ticket asking for help.

Hello Sam and Steve,

Were either of you able to find a solution?

We would like to see the result status in the subject line (Complete, Warning, Error) to enable triage automation. Our upstream MSP360 backup provider did not have a readily available mechanism.