Users can report themselves absent for a period of time and assign someone else as a substitute. If a workflow task is assigned to the absent user during the absence, it automatically switches to the substitute. If the substituting person is also on vacation or sick, it will continue to be considered accordingly.
To report absent, the user simply clicks on his shortcut in the upper right corner and then on "Absence".
The period in which the substitution rule takes effect can then be defined here. In addition, a substitute can also be defined here who is to take over the due tasks.
If a user cannot request the absence himself, this can be set by another user (who has the rights of the "personnel administration"). To do this, this (eg) Admin, open the user management and top right on "Manage absences". Here also current absences can be deleted, edited or adjusted.