How can I backup/restore suspended G Suite user accounts?
Backed up account is safe
If you suspend a user in the G Suite Admin Console which has been actively backed up by CubeBackup, all backup data is safe and will always be accessible when needed.
However, if that user account has not been actively backed up by CubeBackup, you will need to “reactivate” the suspended user in the G Suite Admin Console before their data can be backed up, because Google blocks all access to suspended accounts (including Google API access).
Once the backup for that account has been completed, you can safely suspend the account again, or even remove it from your domain entirely, without worrying about any data loss.