Google Message Security for Google Apps Administration Guide - Manual (Page 391)

Customizing Notifications 391
When using the above string in your notification, the user would only need to
enter a password to log in after clicking the link.
However, if you are using the “Login Widget” on your web site to provide
remote, branded, access to the Message Center for your users, you can
alternatively send users to the page directly that hosts the Widget by simply
inserting the URL and disregarding the use of tokens. For example, you might
use in your notification:
http://www.jumboinc.com/messagecenter
where the URL is the location of the Widget for your organization.
Password Reset Notification
Users receive this notification when an administrator resets their password.
The default Password Reset notification message:
Date: <-date->
From: <-from->
To: <-address>
Subject: Password Notification from <-isp->
Dear <-address->,
For security reasons, we have reset your password. Please use the
temporary password below to log in to your Message Center.
Your new password is:
<-initialPassword->
Log in by following this link:
<-loginhost->