You can define substitute users for periods of absence. The substitute users you specify have the rights to perform tasks assigned to you during this period.
Because assignment and document permissions may differ, the assignment may also be performed by a user who only has read permission to the document. For more information about assignments, refer to Assignment.
The "Substitute Users" dialog.
If the assignment is created after the substitute user has been specified, the substitute user will also receive notification of the assignment. If the substitute user is specified after creating the assignment, the substitute user will not receive any separate notification of the assignment. By using the Assigned to Me shortcut in the task area, the substitute user can view all uncompleted assignments.