Hi Shawn,
Based on my research, if you want to automatically activate the synced users who are associated with @domain.net, please try the Windows Azure PowerShell scripts in the link below:
http://social.technet.microsoft.com/wiki/contents/articles/15905.how-to-use-powershell-to-automatically-assign-licenses-to-your-office-365-users.aspx
Note: Option 1: User based license assignment at that link.
Additionally, since our forum does not focus on the PowerShell script, we can only provide you with the limited support. Microsoft has a dedicated team which is dealing with the PowerShell script issue. I suggest you post your issue to the PowerShell forum. It will be useful for you. Thanks for your understanding.
Best Regards,
Edward Qu