With the 1708 upgrade new wording was added to the bottom of the Business Task Management E-mail Notifications:
The system cannot encrypt this task notification. If you want to receive more detailed task information in the future, send a signed e-mail to: email@example.comSAP Support suggested that I scope in the Question "Do you want to use encryption and signatures for e-mails" and this wording will go away. However, this has not worked. Does anyone have experience with e-mail encryption? I'm also curious what "more detailed task information" could be received regarding tasks if we were to encrypt these e-mails.