The Free On-line Dictionary of Computing (30 December 2018):

BackOffice

    A suite of network server software from
   Microsoft that includes Windows NT Server, BackOffice
   Server (for the integrated development, deployment, and
   management of BackOffice applications in departments, branch
   offices, and medium sized businesses); Exchange Server;
   Proxy Server; Site Server for intranet publishing,
   management, and search; Site Server Commerce Edition For
   comprehensive Internet commerce transactions; Small
   Business Server for business operations, resource management,
   and customer relations; SNA Server for the integration of
   existing and new systems and data; SQL Server for scalable,
   reliable database and data-warehousing; Systems Management
   Server (SMS) for centralised change- and
   configuration-management.

   (http://microsoft.com/backofficeserver/).

   (2000-12-16)