Before you can setup your G-Suite on Exchange, you need to setup your G-Suite password and enable 2-step Verification.
You need to enable 2-step Verification
Click 'Mail', and select 'Add Account...'
Enter your Ackroo email
Enter your password
Enter your verification code
Select the services you wish to sync
A new Inbox appears, the Google inbox
*** All of your current emails will be downloaded in this inbox