When a user is out-of-office for longer then a day during issue assignment the issue can be reassigned to a specific user or a user of a group. The new assignee will be notified about the reason with comment on the issue.
The rule itself is based on the example Basic - Unassign an out-of-office user. So after checking the users out-of-office state the following steps can be added.
This step is needed to get the new assignee from the previous step