Disaster recovery for OnePlan is handled by Microsoft as we use Azure services (not servers) to host OnePlan. Data is geo-replicated in real time as data is added / updated.
Azure helps to avoid potential disasters and quickly recover if the organization does get hit by disaster. Azure offers resiliency for cloud-based applications and data by providing for business continuity in the following ways:
High availability: Azure's cloud based systems are consistently operational over long periods of time. Azure uptime, expressed as a rolling 12 month average to June 2019, was 99.996%, or approximately 26 minutes of downtime per year.
Disaster recovery: All data is geo-replicated to Azure's data centers as needed. If one data center were to go down, the data is backed up to another data center.
Microsoft also has policies on handling the actual physical drives that store the data. Learn more about Microsoft's data management policies.