The Challenge
The organisation relied on Microsoft 365 and local file servers but lacked a unified backup strategy resistant to tampering. Accidental deletions, ransomware attacks, or configuration errors could lead to irreversible data loss.
The Approach
We designed and implemented a comprehensive backup and recovery framework:
- Hybrid Backup Design: Dual architecture combining cloud backups with local redundancy
- Immutable Storage: Write-once, read-many (WORM) policies preventing backup alteration or deletion
- Disaster Recovery Exercises: Full and partial restore tests with detailed playbooks
- Continuous Monitoring: Backup system integration into security dashboards
The Solution
All Microsoft 365 data and local servers received automated, secure backups. Immutable storage protected data from external threats and internal errors.
Architecture
Data Sources
Microsoft 365 - Teams, SharePoint, Exchange + on-premises servers
Backup Agents
Lightweight connectors capturing incremental snapshots
Local Repository
High-availability NAS with snapshotting
Cloud Repository
Secure vault in EU data centre
Immutable Layer
WORM configuration enforcing immutability
Results
- Recovery time objectives reduced from days to hours
- Alignment with ISO 27001 Annex A.5.29-31 and NIS2
- Senior management expressed renewed confidence in data integrity
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