First, go to a Property of interest, and open a Task/Note.
To assign this task click on “Add a User” button and select from the list.
!Warning: You will only be able to assign a task to a user that you granted access to this property. Otherwise, the user will not show up in the list of potential assignees.
Similarly, you can add a follower to the task by clicking on the “Add a User” button under the “Followers” section.