Configured Workspace365 (How to configure Workspace 365)
Configured Sharepoint access within Workspace365
Log in to the admin portal of your Office365 enviroment
Go to Users --> Active Users
Select the primary administrator account and click on Edit
Go to Licenses and unselect the Office 365 License, then click Save
You have freed up one Office365 license which can now be used for a secondary admin account with an Office365 license without having to buy an additional license.