Hello @nameisnani ,

For this you can implement an Business Rule:

> Create a Business Rule on the Incident table.

> Trigger: Before Update

> Condition:

• current.state == 'On Hold'

• (current.assignment_group.changes() || current.assigned_to.changes())

> Action:

• Set current.state = 'In Progress'

> also in BR add a check :

if (!current.work_notes.changes()) {
    gs.addErrorMessage('Work Notes are mandatory when reassigning an On Hold incident.');
    current.setAbortAction(true);
}

If my response helped mark as helpful and accept the solution.