Click the Navigator icon , and then under Create and Manage, click Task Lists.
Select the task list to modify.
Click .
Click .
Select the users or groups to access the task list.
Click Users to display all user names; click Groups to display all groups.
If there are multiple pages of users and groups, a pagination bar displays at the bottom of the page to help you navigate between the pages and to jump to a specific page.
For Type of Access, select how users or groups can use the task list: