A new administration option is available for SharePoint Online administrators to manage SkyDrive Pro storage allocation
Go to your SharePoint Online administration portal using the Admin menu from the Office 365 portal or use the direct URL https://<your tenant>-admin.sharepoint.com
Then, on the left side, go to the new SkyDrive Pro section
Then you will be able to change the storage allocation – from 25 Gb to 100 Gb – by entering the email address(es) of the user(s) to be impacted by this storage allocation change
On the top right, you will also be able to see the global storage allocation for your tenant and the storage currently consumed