Synology Active Backup for Business: Complete 2026 Guide to License-Free Enterprise Backup

Commercial backup products such as Veeam, Acronis and Datto are licensed per workload, device or subscription, so the cost grows with the number of protected systems. Synology Active Backup for Business takes a different approach: Synology states you can protect an unlimited number of devices and data, license-free, on a compatible NAS you already own or buy.

This guide covers ABB requirements and setup, the relationship between ABB and Synology's ActiveProtect appliance and ActiveProtect Manager, and practical deployment strategies with immutable snapshots.

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Why Active Backup for Business? The License-Free Advantage

Traditional enterprise backup solutions like Veeam, Acronis, and Datto charge per-endpoint or per-workload licensing fees that accumulate year after year. Synology took a fundamentally different approach: Active Backup for Business is included free with every compatible Synology NAS.

Cost Considerations

Active Backup for Business has no per-device or annual software fee, so the cost of a deployment is mostly hardware: the NAS, enough drives for your data and retention, a UPS, and an off-site copy (a second NAS, an external drive, or cloud storage such as Synology C2). Veeam, Acronis and Datto each publish editions, quote-based or reseller pricing, and different bundling of hardware, so a fair comparison needs current quotes for your own mix of workstations, servers and VMs.

Two cost points are worth planning for. Storage needs depend on your data size, change rate and retention, and ABB's deduplication results vary by environment. If you later manage several backup servers with ActiveProtect Manager, more than three backup servers per site require a term-based license pack.

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Active Backup for Business vs. Synology ActiveProtect

Synology launched the ActiveProtect appliance, a purpose-built backup appliance that integrates with Active Backup for Business environments, by June 2025, and ActiveProtect Manager now manages sites of backup servers (ActiveProtect Manager 2.0 was announced in October 2026). Understanding the relationship between ABB and ActiveProtect helps when you plan a multi-site deployment.

What's the Difference?

Active Backup for Business remains the core backup engine—it's what actually performs backups of your PCs, Macs, VMs, and SaaS accounts. This is still completely license-free.

ActiveProtect Manager is a centralized management layer. One ActiveProtect appliance acts as the management server for a site, and Synology NAS servers running ABB (version 3.0.0 or later) can join it. Synology describes it as providing:

• A dashboard to monitor ABB workloads, backup status and error logs
• Backup copy policies, including automatic off-site copies
• Restore drills across multiple targets
• Version-level immutable backups and air-gapping on the appliance

When Do You Need ActiveProtect?

Stick with standalone ABB if:

• You have a single Synology NAS
• You manage a few NAS units manually
• You're a small business with one location

Consider ActiveProtect if:

• You manage several Synology backup servers and want one console
• You want backup copy policies and restore drills managed centrally
• You want version-level immutable backups or air-gapped copies on a dedicated appliance

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What Can Active Backup for Business Protect?

ABB consolidates protection for your entire IT environment into a single management console. No more juggling separate tools for workstations, servers, and cloud services.

Supported Platforms and Workloads

Efficiency Through Global Deduplication

One of ABB's most powerful features is global deduplication—the ability to identify and eliminate duplicate data blocks across all backup sources, not just within individual backups.

Example: Consider backing up 30 Windows 11 PCs. Each system contains many identical Windows system files. Without deduplication, those common files are stored 30 times; with global deduplication they are stored once and referenced by all 30 backups.

Changed Block Tracking (CBT)

ABB uses Changed Block Tracking to identify only the data blocks that have changed since the last backup. This dramatically reduces:

• Backup windows: Incremental backups are typically much faster than full backups
• Network bandwidth: Only changed blocks traverse the network
• Storage consumption: Combined with deduplication, backups use less space than repeated full copies

For VMware and Hyper-V environments, CBT operates at the hypervisor level, enabling efficient VM backups without installing agents inside guest operating systems.

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Critical Features for Business Continuity

Bare-Metal Recovery

When a hard drive fails catastrophically—or ransomware encrypts an entire system—bare-metal recovery restores everything: operating system, applications, settings, and data. You boot from recovery media, connect to your NAS, select the restore point, and watch your system rebuild itself.

Recovery process:

1. Boot from ABB recovery media (USB or ISO)
2. Connect to the Synology NAS
3. Select the device and restore point
4. Choose target disk (can be different hardware)
5. Restore time depends on the amount of data and your network and disk speed

This capability removes the time-consuming process of reinstalling Windows, reconfiguring applications, and documenting all the settings manually.

Ransomware Protection with Immutable Snapshots

Modern ransomware often targets backup systems directly, attempting to delete or encrypt backup data before attacking production files. Synology recommends applying immutable snapshots to the shared folder used as the ABB backup destination, which addresses this threat vector. For broader ransomware defense strategies, see our cybersecurity software guide.

Immutable snapshots (WORM - Write Once, Read Many):

• Cannot be removed for a defined protection period (Synology recommends 7 to 14 days)
• Protected even if attackers gain admin access to the NAS
• Require DSM 7.2 or later and a Synology model that supports immutable snapshots
• Applied to the backup destination folder; WriteOnce (WORM) shared folders cannot be used as ABB destinations

The 3-2-1 Backup Strategy with ABB

A robust backup strategy maintains:

• 3 copies of your data
• 2 different storage types
• 1 copy off-site

ABB facilitates this strategy through:

1. Primary backup on your Synology NAS (local, fast recovery)
2. Snapshot Replication to a second Synology NAS at another location
3. Cloud or external backup with Hyper Backup (for example Synology C2, S3-compatible storage or Azure) if you have only one NAS

For detailed implementation of the 3-2-1 strategy, see our disaster recovery planning guide.

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Practical Setup Guide

Prerequisites

Before installing Active Backup for Business, verify your environment meets these requirements:

Step 1: Install Active Backup for Business

1. Log into DSM and open Package Center
2. Search for "Active Backup for Business"
3. Click Install (may require accepting Synology's terms)
4. Launch the application from the main menu

Step 2: Create a Backup Destination

ABB does not require a license key or activation. Backup destinations must be shared folders on Btrfs volumes (not encrypted shared folders for PC, server and VM backups), with shared folder quotas disabled for best deduplication performance.

Step 3: Configure Security Settings

Review the certificate setting:

ABB uses either its dedicated certificate or the DSM system certificate, depending on how agents connect. Synology recommends the DSM system certificate when agents connect through a DDNS name; the dedicated certificate applies when agents connect by IP address using the DSM general certificate. The dedicated certificate is valid for up to 10 years, which avoids interruptions when the DSM certificate renews automatically.

1. Go to Settings > Certificate in Active Backup for Business
2. Enable the dedicated certificate and click Apply if it suits your connection method

Switching certificates interrupts backups, so make the change before deploying agents widely.

Configure network settings:

Use a static IP address, a DHCP reservation, or a DNS/DDNS name for your NAS so agents can keep connecting. Agents connect to the NAS on port 5510. For network setup guidance, see our small business network setup guide.

Step 4: Optimize Performance Settings

Compression settings:

Bandwidth throttling:

ABB can limit the total network traffic used by PC and physical server backup tasks so backups do not saturate your network:

1. Go to the Settings tab in Active Backup for Business
2. Turn on the option to throttle PC and physical server backup traffic and set the limit (optionally only for devices within an IP range)
3. Use backup windows in your tasks to allow or block backups at certain times of day

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Deployment and Management

Mass Deployment for Windows Environments

For organizations with Active Directory, deploy the ABB agent via Group Policy:

1. Download the MSI installer from your Synology NAS
2. Create a GPO for workstation deployment
3. Set the installer properties for your NAS address, username and password (see Synology's mass deployment guide)
4. Agents install silently and connect to the NAS

Silent install command (from Synology's documentation; use a limited account created for this purpose, since the password is passed on the command line):

msiexec /i "Synology Active Backup for Business Agent-<version>-x64.msi" /quiet address="nas.yourdomain.com:5510" username="<account>" password="<password>"

Scheduling Options

ABB offers flexible scheduling to match your operational requirements:

Retention Policies: The GFS Strategy

The Grandfather-Father-Son (GFS) retention strategy balances storage efficiency with recovery flexibility:

Example configuration:

• Retain daily backups for 7 days
• Retain weekly backups (every Saturday) for 4 weeks
• Retain monthly backups (first Saturday) for 12 months

This provides 23 distinct recovery points spanning an entire year while consuming far less storage than keeping daily backups indefinitely.

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Recovery Options

Self-Service File Recovery Portal

ABB includes a web-based recovery portal that allows end users to restore their own files without IT intervention:

1. Users access the portal via browser (https://nas-address:5001)
2. Sign in with a DSM account that has access (administrators, users delegated by the admin, or the signed-in owner of a PC backup)
3. Browse backup versions by date
4. Select and download needed files

Instant Restore for Virtual Machines

When a VM fails, ABB's instant restore capability boots the VM directly from backup storage while restoration completes in the background:

1. Select the failed VM in ABB console
2. Choose "Instant Restore"
3. The VM starts from the backup on the hypervisor you select (VMware vSphere, Hyper-V, or Synology Virtual Machine Manager)
4. When the restore completes, use Restore Status > Migrate VM (a storage vMotion on vSphere) to move it to production storage

This can shorten downtime for critical virtual servers compared with waiting for a full restore.

Windows-to-VM Conversion

ABB can restore a physical Windows server as a virtual machine—invaluable for:

• Hardware failures when replacement hardware isn't immediately available
• Disaster recovery to an alternate hypervisor
• Testing restores without affecting production hardware

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Pro Tips from Expert Deployments

Disaster Recovery for ABB Itself

Synology documents two ways to copy Active Backup for Business data in case of an IT disaster: Snapshot Replication if you have multiple Synology NAS units, or Hyper Backup if you have only one NAS (to the cloud or other storage). Synology suggests the 3-2-1 strategy for these copies.

Snapshot Replication to a second NAS

1. Install Snapshot Replication from Package Center
2. Replicate the ABB shared folder to a second Synology NAS
3. If the primary NAS fails, relink the replicated data in Active Backup for Business on the destination NAS (Synology's tutorial covers the relink and re-protect steps)
4. Re-enter credentials where needed (for example vSphere hypervisors and, if the NAS address, username or password differ, the agents on PCs and servers)

Hyper Backup

Hyper Backup can back up ABB data to the cloud or other media, and Synology's tutorial covers restoring and relinking it. Synology does not recommend Hyper Backup if the ABB folder contains file server backups, because of limits in backing up metadata.

Services Synology advises against: Cloud Sync and Synology Drive can't be used to sync or back up ABB data because of possible inconsistencies, and Shared Folder Sync is not recommended because global deduplication is not compatible with it.

Schedule ABB backup and version deletion tasks at different times from Snapshot Replication or Hyper Backup tasks to avoid data inconsistencies that can make relinking fail. You can also add the NAS to an ActiveProtect site to copy ABB data to an ActiveProtect appliance. See Synology's tutorial, How do I back up and relink Active Backup for Business data to a destination Synology NAS?.

Storage Planning and Deduplication Ratios

Deduplication results depend heavily on how similar your systems are: fleets of identically imaged Windows PCs deduplicate much better than diverse servers, and Synology publishes no standard ratio. Measure your own results during a pilot before you size drives.

Planning estimate (not Synology guidance): Provision at least 1.5-2x your total source data size for the backup repository, to cover multiple retention versions and growth.

Network Architecture Best Practices

• Dedicated backup VLAN: Isolate backup traffic from production network
• Jumbo frames: Enable 9000 MTU for 10GbE environments
• Static IP/DHCP reservation: Prevent agent connectivity issues
• DNS entry: Create a DNS record (e.g., backup.company.com) for easier management

For comprehensive network planning including backup infrastructure, see our IT server room setup guide.

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Comparison with Alternative Solutions

Veeam, Acronis and iDrive are separate commercial products with their own editions, pricing and feature lists, so compare each vendor's current pages before deciding. What sets Synology ABB apart is that it has no software license fee, runs on your own Synology NAS (backup destinations must be Btrfs shared folders), and covers Windows PCs, Macs, Linux and Windows servers, VMware and Hyper-V VMs, file servers, and, through companion packages, Microsoft 365 and Google Workspace.

For businesses using Google Workspace or Microsoft 365, Synology's companion packages (Active Backup for Microsoft 365 and Active Backup for Google Workspace) provide SaaS backup to your NAS without a license fee. See our Google Workspace backup guide for detailed SaaS backup configuration.

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Frequently Asked Questions

Does Active Backup for Business work with any Synology NAS?

Not every model. ABB runs only on x64 Synology NAS servers with Btrfs volumes, so models without an x64 CPU or Btrfs support can't run it; check Synology's compatible models list for your NAS. Models that qualify include the DS925+, DS1825+, and many rackmount RS series units.

Can I use ABB on an isolated network without internet?

ABB does not require license activation, so it does not depend on a license check. Backups run between the agents and your NAS on your local network. ActiveProtect Manager is different: Synology states it needs internet access for license information.

How does ABB handle Mac backups compared to Time Machine?

ABB provides file-level versioning with centralized management, global deduplication, and bare-metal recovery media for Macs.

Note on Mac Recovery: While bare-metal recovery is supported for macOS (including Apple Silicon), the process requires more steps than Windows—involving the Synology Recovery Wizard and Apple Migration Assistant. We recommend strictly following the Synology Mac Recovery Guide during your first test restore.

What happens if my NAS fails?

If you've configured Snapshot Replication to a secondary NAS, you relink the replicated backup data in Active Backup for Business on that NAS, so you avoid a full restore, although you may need to re-enter credentials. With only a Hyper Backup copy, you restore the data first and then relink it, which takes longer.

Can I restore files to a different computer?

Yes. ABB supports cross-machine restoration for file-level recovery. Individual files and folders restore to any compatible system.

Does bare-metal recovery work on dissimilar hardware?

Restoring to different hardware can need extra steps, such as drivers for storage or network controllers, so test it before you depend on it. Restoring a Windows or Linux physical server to a virtual machine with instant restore is another route; see Synology's documentation for the supported options.

How much bandwidth does ABB use?

Initial full backups consume significant bandwidth (plan for off-hours or weekends). Subsequent incremental backups transfer only changed data, so their size depends on your change rate. Traffic throttling and backup windows help prevent network saturation.

Can I back up Linux machines (Ubuntu, Debian, Fedora, RHEL)?

Yes, on the releases Synology lists. Linux systems are backed up as "Physical Servers" with the Linux agent; Synology lists supported Ubuntu, Debian, RHEL, CentOS and Fedora versions, ext2/3/4 and XFS file systems, and kernels 2.6 to 6.14. Desktop distributions are not listed separately, so verify your distribution and kernel against the requirements and limitations and the Synology Linux agent documentation before deploying.

Why do Windows backups fail with VSS errors?

Volume Shadow Copy Service (VSS) errors are the most common ABB troubleshooting issue. Common causes include:

• VSS writers in failed state: Run vssadmin list writers in an elevated command prompt to identify stuck writers
• Insufficient disk space: VSS requires free space on the system drive for shadow copies
• Third-party backup software conflicts: Disable or uninstall other backup agents that might lock VSS
• Corrupted VSS components: Run sfc /scannow and consider resizing the shadow copy storage area

If backups consistently fail, check the ABB agent logs and Windows Event Viewer for specific VSS error codes.

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Getting Started

Active Backup for Business removes per-device software licensing from your backup costs. The combination of license-free operation, cross-platform support, global deduplication, and immutable snapshots gives small businesses a capable backup platform without per-device software fees.

Implementation checklist:

• Verify NAS compatibility (x64 CPU, Btrfs volume)
• Update DSM (7.2 or later for immutable snapshots; 7.4 is current)
• Install Active Backup for Business
• Review the certificate setting
• Set static IP, DHCP reservation, or a DNS name
• Deploy agents to endpoints
• Configure GFS retention policies
• Enable immutable snapshots on the backup destination (7-14 day protection)
• Set up Snapshot Replication to a second NAS, or Hyper Backup if you have one NAS
• Test a bare-metal restore
• Train users on self-service recovery portal

Once configured, ABB operates as a "set and forget" solution—backing up your entire environment automatically while you focus on more strategic IT initiatives.

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Related Resources

• Synology NAS Review 2026: Complete Business Guide – Hardware selection and DSM features
• Synology Snapshots Explained – Deep-dive on immutable snapshot configuration
• UGREEN vs Synology NAS Comparison – Alternative NAS hardware options
• Google Workspace Backup Guide – SaaS backup strategies
• iDrive Business Review – Cloud backup alternative
• Small Business Disaster Recovery Guide – 3-2-1 strategy implementation
• Best NAS for Small Business – NAS comparison guide

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This guide reflects Synology documentation as of October 27, 2026 (DSM 7.4 is the current release). Features, licensing and compatibility may change with future updates; confirm current details on Synology's website.