Microsoft announced yesterday (June 30, 2015) the availability of the PowerShell for Office 365 for IT administrators.
I would suggest that you first read their blog post on Getting Started with PowerShell for O365.
PowerShell for O365 is not intended to replace the O365 Admin Center, but rather it provides complementary tools for such scenarios as:
- Adding or editing a large number of users
- Using multiple filters when sorting data
- Exporting data such as user lists and groups
- And more …
The web site includes sample scripts, scenarios, and community interaction. Check it out!