Panel > Manage Domains, click the Edit button next to the domain in question.
On the following page, uncheck the 2 Google options and hit the “Change to Fully Hosted now” button.
Go make a coffee and when you get back take a look at Email > CustomMX/Gmail.
If the domain reports it is using Gmail, click Edit then “Make me regular now!”.
Alright now your domains are in order you can safely login with your Domain Admin details at:
Click on the [color=#0000CC]Domain settings[/color] TAB and select [color=#0000CC]Account information[/color].
In the Account type field you will see a link that says :
Delete Google Apps for [color=#CC0000]domain.com[/color]
Maximum Cash Discount on any plan with MAXCASH