Backup and disaster recovery solve different problems. Backup keeps copies of data so you can restore a deleted file, a corrupted database or an encrypted server to an earlier point in time. Disaster recovery keeps whole systems running elsewhere so the business can continue when a site, region or platform fails. In Azure, Azure Backup handles the first and Azure Site Recovery handles the second. How much of each you need is set by two numbers: your RPO (how much data you can afford to lose) and your RTO (how long you can afford to be down).
RPO vs RTO
| Recovery Point Objective (RPO) | Recovery Time Objective (RTO) | |
|---|---|---|
| Question it answers | How much data can we lose? | How long can we be offline? |
| Measured as | Time since the last good copy | Time from outage to restored service |
| Example | RPO of 4 hours: lose at most 4 hours of transactions | RTO of 2 hours: system back within 2 hours |
| Drives | Backup frequency and replication | Recovery automation and standby capacity |
Set RPO and RTO per system, not once for the whole company. An ERP or payment platform may need minutes; an archive file share may tolerate a day. Tighter targets cost more, so the business — not just IT — should agree them.
Azure Backup vs Azure Site Recovery
| Azure Backup | Azure Site Recovery | |
|---|---|---|
| Purpose | Point-in-time restore of data | Keep workloads running after an outage |
| Protects | Azure VMs, SQL and SAP HANA in VMs, Azure Files, blobs, on-premises servers | Azure VMs, on-premises VMware and Hyper-V VMs, physical servers |
| Typical RPO | Hours to a day (by schedule) | Minutes (continuous replication) |
| Typical RTO | Hours (restore time) | Minutes to hours (orchestrated failover) |
| Best for | Deletion, corruption, ransomware, long-term retention | Region or datacentre failure, planned migrations |
Most organisations need both: replication without backup simply copies corruption or ransomware to the second site, and backup without DR can leave you restoring servers one by one for days.
Protecting backups from ransomware
Attackers now target backups first. In Azure, protect them with:
- Soft delete — deleted backup data is retained for a recovery window instead of disappearing immediately.
- Immutable vaults — prevent backup data from being altered or deleted before it expires.
- Multi-user authorisation — require a second approver for destructive operations on the vault.
- Separate access — restrict who can manage Recovery Services vaults, with privileged access controls and MFA.
- Monitoring — alert on failed jobs and suspicious changes, ideally in a SIEM such as Microsoft Sentinel.
The classic 3-2-1 rule still applies: three copies of data, on two types of storage, with one copy isolated from your production environment.
Regions and data residency in the UAE
Azure has two UAE regions: UAE North (Dubai) and UAE Central (Abu Dhabi), which form a region pair. That lets UAE organisations replicate production in Dubai to standby capacity in Abu Dhabi — or vice versa — while keeping data in the country. Check which services and VM sizes are available in each region during design, because availability can differ between the two.
What about Microsoft 365 data?
Microsoft keeps Microsoft 365 services highly available, but under the shared responsibility model protecting your data against accidental deletion, malicious insiders and long-term retention needs is your job. Retention policies, Microsoft 365 Backup or a third-party backup tool cover Exchange, SharePoint, OneDrive and Teams data — plan this alongside Azure workloads, not separately.
Building a DR plan: a short template
- List critical systems and their dependencies (identity, DNS, networking, databases).
- Agree RPO and RTO with business owners for each system.
- Choose the protection pattern — backup only, backup plus Site Recovery, or active/active.
- Design the target environment — networking, firewalls and identity in the DR region. Our cloud networking and firewall architecture work covers this.
- Build recovery plans in Site Recovery so multi-tier apps start in the right order.
- Test failover at least twice a year using isolated test networks, and record actual recovery times.
- Document and assign roles — who declares a disaster, who executes, who communicates.
Common mistakes
- Never testing restores, then discovering backups are incomplete during an incident.
- Forgetting dependencies such as domain controllers, DNS and licence servers in the DR region.
- Keeping backups in the same subscription and under the same admin accounts as production.
- Setting aggressive RTOs without paying for the standby capacity to meet them.
If you are moving servers to Azure, build backup and DR into the migration rather than adding them later — see cloud migration phases and what can go wrong.
Protect your workloads with M365 Enterprise Hub
We design and run cloud backup and disaster recovery for organisations in the UAE and the US, as part of our Microsoft Azure cloud services and Azure migration services. Running virtual desktops too? Read what Azure Virtual Desktop is. Contact us to review your recovery targets.
Frequently Asked Questions
What is the difference between backup and disaster recovery?
Backup stores point-in-time copies of data so it can be restored after deletion, corruption or ransomware. Disaster recovery keeps entire systems available in another location so the business can continue during a major outage.
What is the difference between RPO and RTO?
RPO, the recovery point objective, is the maximum acceptable amount of data loss measured in time. RTO, the recovery time objective, is the maximum acceptable time to restore a service after an outage.
Is Azure Site Recovery a backup solution?
No. Azure Site Recovery replicates and fails over workloads for disaster recovery. It should be combined with Azure Backup, which provides point-in-time restore and protection against corruption and ransomware.
Can Azure disaster recovery keep data in the UAE?
Yes. UAE North and UAE Central are an Azure region pair, so workloads can be replicated between Dubai and Abu Dhabi while data stays in the country, subject to service availability in each region.
How often should disaster recovery be tested?
Test failovers at least twice a year and after major changes. Azure Site Recovery supports test failovers into isolated networks that do not affect production.
Does Microsoft back up my Microsoft 365 data?
Microsoft ensures service availability, but protecting your data against deletion, insider threats and long-term retention needs is the customer’s responsibility under the shared responsibility model. Use retention policies and a Microsoft 365 backup solution.