Depending on your Edition of G Suite, you may have limited functionality in BetterCloud.
Google offers fewer APIs to "Basic" domains than Business, Education, Government, and Nonprofits:
- If you have G Suite for Business, Education, Government, or Nonprofits, you will be able to use BetterCloud without limits.
- If you have the legacy "Google Apps," (aka "free" or "Standard Edition") there will be limitations when using BetterCloud.
How Do I know which version I have?
Your edition of G Suite is labeled in the Google Admin Console, which you can find here.
In the Admin Console, you must click into the "Billing" section from your Dashboard, to view your G Suite edition. 
If you have the legacy edition of Google Apps (free) only the following functionality will not work in BetterCloud:
Email Settings:- Signatures
- Delegates
- Monitors
- Send-as Alias
- Labels
- Filters
- Forwarding
- IMAP/POP
- Auto Reply
- Web/General Settings
- Language
- Calendar Resources
- Cannot update Group Settings
Contacts
- Cannot manage sharing of contacts