Go to the workload space
Click on the send button under the members sandwich
Select the desired week and members you want to send to send email to
Note: Any members that do not have workplans scheduled for the selected week will not able to be selected
Click confirm
You have the option to select member(s) with workload access level or above to receive a copy of the email(s) by clicking on the blue "0 people" text
Click send. The members will get a notification in Mosaic, as well as an email about their Work Plans.