ansible-change-uid-gid.yml

# ansible playbook illustrating two approaches to change a list of users' uid:gid and
# update homedir files owner and mode to match
- hosts: all
  vars:
    user_dict:
      bob:  2001
      alice: 2002
    user_list:
    - bob
    - alice
  tasks:
  - name: declare user and uid from parallel sets
    user:
      name:  "{{ item.0 }}"
      uid:   "{{ item.1 }}"
      group: "{{ item.0 }}"
    with_together:
    - "{{ user_list }}"
    - "{{ range(2001,2003} | list }}"
  - name: declare user and uid from dictionary
    user:
      name: "{{ item.key }}"
      uid: "{{ item.value }}"
      group: "{{ item.value }}"
    with_dict: "{{ user_dict }}"
  - name: declare group name and numeric id from parallel sets
    group:
      name: "{{ item.0 }}"
      gid:  "{{ item.1 }}"
    with_together:
    - "{{ user_list }}"
    - "{{ range(2001,2003} | list }}"
  - name: declare homedir owner and permission mode recursively using symbols from a list
    file:
      recurse: yes
      path:  "/home/{{ item }}"
      owner: "{{ item }}"
      group: "{{ item }}"
      mode:  u+rwX,go-rwx
    with_items:
    - "{{ user_list }}"

What about cronjobs or mail?