Find steps to add footer in  Google Apps

  1. Sign in to the Google Admin console
  2. From the dashboard, go to Apps > Google Apps > Gmail > Advanced settings
  3. In the Organizations section, highlight your domain or the organizational unit for which you want to configure settings (see Configure advanced settings for Gmail for more details).
  4. Scroll down to the Append footer section:
    • If the setting's status is Not configured yet, click Configure (the "Add setting" dialog box displays).
    • If the setting's status is Locally applied, click Edit to edit an existing setting (the "Edit setting" dialog box displays), or click Add another to add a new setting (the "Add setting" dialog box displays).
    • If the setting’s status is Inherited, click View to view the inherited setting, or click Add another to add a new setting (the "Add setting" dialog box displays).
  5. Type the content for the footer and, optionally, use the formatting tools provided.
    Note: There is a 10,000 character limit.

  6. Optional. You can select append the footer to internal messages being sent within your organization.
  7. When you're finished, click Add Setting or Save to close the dialog box.

    Note: Any settings you add will be highlighted on the "Email settings" page.

  8. Click Save changes at the bottom of the "Email settings" page.
  9. Test the footer by sending a message to an address outside of your domain. (There may be some delay in saving the changes and taking effect on new mail.)

Note: When you're finished, click Add Setting (at the bottom of the dialog box), and then click Save changes (at the bottom of the "Email settings" page) to confirm your changes.