
Google says it tried to join the evaluation process but was turned away.
The DOI then selected Microsoft BPOS-Federal Suite, thanks to Microsoft's multi-decade long history of providing software for government departments.
Microsoft's BPOS-Federal Suite includes hosting services, Exchange Online, SharePoint Online, and Office Communications Online.
Google wanted to challenge the BPOS-FS with its Google Apps for Government suite, claiming it could be implemented more cheaply and more effectively than Microsoft's rival service.
The search giant wants the requisition process halted until Google Apps is given a fair chance.