Disaster Recovery e OCS? Not a problem, a Microsoft disponibilizou um documento sobre como prover resiliência entre sites when o site principal é perdido, usando este documento como base vocês podem começar a criar o plano de DR também para o OCS :).

Using backup and restoration procedures for site disaster recovery as described in the Microsoft Office Communications Server 2007 R2 documentation library topic Backup and Restoration, can entail some downtime for users.
This white paper describes a site resiliency solution for Office Communications Server 2007 R2. The solution includes an Enterprise pool that spans two geographically separate sites. The solution provides a failover mechanism between the two sites to ensure that Office Communications Server functionality such as instant messaging, presence, and conferencing remains available even if one of the sites becomes unavailable.
This white paper is divided into three main sections:

• The Solution section provides an overview of the tested and supported site resiliency solution described in this paper.
• The Test Methodology section describes the testing topology, expected behavior, and test results.
• The Findings and Recommendations section provides practical guidance for deploying your own failover solution.

To successfully follow this paper, you should have a thorough understanding of Office Communications Server 2007 R2 and Windows Server 2008 Failover Clustering.

Mais informações: http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=c930febb-3a44-4bf3-969d-1c52675a7063

Grande Abraço,
Anderson Patricio
http://www.andersonpatricio.org