The Approval Configuration screen allows you to specify expressions that will be used to populate an user picker_All and the user picker _Any that have been selected for an Approval Configuration.

Overview

The Approval Configuration screen displays the available properties to setup an Approval :

When selecting an user picker_All or an user picker _Any , you are able (Optionally) to specify expressions that identify

users that will be filled on the user picker custom field in order to enable them to approve and
users that will be removed by the user picker in order to exclude them.

just clicking on the icon showing on the right side of the select list:

The Auto populate user picker field based on expression dialog requires an expression specifying the users to insert in the user picker field and optionally the users to erase from the list.

You cannot specify the users to exclude without specify the users to add to the list.

A valid expression requires that you respect the expected syntax.

The Syntax of generic expression is the following:

Tags allowing to specify the properties:

<users>...</users>
<groups>....</groups>
<roles>....</roles>
<group-pickers>...</group-pickers>
<user-pickers>...</user-pickers>
<component-leads>..</component-leads>.

Tags allowing to specify conditions enabling a set of properties

<conditional-rule name="Conditional Rule Name">...</conditional-rule>