Requirement assigned to a user with Resposible name is not showing under 'Today' - by: prakash

Hi,

Created a requirement and assigned to a user with selecting user name under 'responsible'.
But when the respective user login, requirements are neither showing under 'Tasks assigned to me' list nor 'Tasks I am responsible for' list in 'today' screen.

Please guide me if any configuration required to overcome this issue.
Thanks in advance.