Workflow Routing

Hi everyone! We are running 46C and I have setup an org unit with positions and usernames assigned to positions. However, my workflow will not send to all users in the org unit... I have set it up as a general task and the agent assignment in the workflow step as org unit. How can I get my workflow item to appear in all the inboxes of the users in that org unit? Thank you very much! Hoping for your replies.