Archiving Server is a server role in Office Communications
Server. Archiving Server provides a solution for archiving the
content of instant messages (IM) sent in Office Communications
Server for compliance purposes. For details about what Archiving
Server does, see
Depending on the archiving configuration, and compliance needs of your deployment, you might deploy Archiving Server on one or many computers. The deployment procedures in this documentation apply to each Archiving Server that you deploy.