A disaster recovery plan is not a document you create after a server failure, ransomware attack, or office closure. It is the set of decisions that determines whether your team can keep serving customers when those events happen. Knowing how to plan disaster recovery means identifying what your business cannot afford to lose, deciding how quickly each system must return, and proving that your recovery process works before an emergency puts it to the test.
For a small or mid-sized business, the stakes are practical. A few hours without email, accounting software, customer records, shared files, or phone access can interrupt sales, delay payroll, and erode client confidence. The goal is not to protect every system in exactly the same way. It is to restore the right systems in the right order, within a recovery window your business can realistically support.
Start With the Business Impact, Not the Technology
The first step in disaster recovery planning is a business impact analysis. This sounds formal, but the conversations are straightforward: What stops when this system is unavailable? Who is affected? How long can the business operate without it? What is the financial, operational, or compliance consequence?
Start with the services your team relies on daily. For many businesses, this includes Microsoft 365, email, line-of-business applications, file storage, accounting systems, customer relationship management platforms, internet access, phones, servers, and network equipment. Do not overlook identity systems such as Microsoft Entra ID or Active Directory. If staff cannot sign in, they may be unable to reach any of the tools that are technically still running.
Talk to department leaders rather than making assumptions. The accounting team may be able to work around a file server outage for a day but not during month-end. Operations may depend on a scheduling platform that the rest of the company barely notices. This analysis turns recovery planning from a generic IT checklist into a plan built around how your business actually operates.
Set Recovery Time and Data Loss Targets
Two measurements should guide your decisions: recovery time objective and recovery point objective.
Your recovery time objective, or RTO, is the maximum acceptable downtime for a system. If your order management system must be back within four hours to avoid serious disruption, its RTO is four hours. A historical archive may be able to wait several days.
Your recovery point objective, or RPO, defines how much data you can afford to lose. An RPO of one hour means you need a recoverable copy of data that is no more than one hour old. An RPO of 24 hours may be acceptable for less active information.
Shorter RTOs and RPOs typically require more investment. A nightly backup might be sufficient for an archive but unacceptable for a busy database that changes all day. Be direct about these trade-offs. The right target is not the fastest possible recovery. It is the level of recovery that protects revenue, customer commitments, and risk exposure at a cost that makes business sense.
Build a Complete Recovery Inventory
A recovery plan can fail because it overlooks one dependency. Restoring a server is not useful if the firewall configuration is missing, the internet connection is down, employees do not have remote access, or the application vendor has not provided required installation media and license details.
Document each critical system, its owner, its location, and its dependencies. Record where data lives, how it is backed up, who has administrator access, and what is needed to restore it. Include cloud platforms as well as on-premises equipment. Cloud services reduce certain risks, but they do not eliminate accidental deletion, account compromise, configuration mistakes, or outages affecting a specific provider.
Your inventory should also include the details that are often hard to find under pressure: support contacts, account numbers, domain registrar access, ISP information, software licenses, encryption key locations, network diagrams, and vendor escalation procedures. Store this information securely and make sure authorized leaders can access it if the primary office or network is unavailable.
Design Backups for Real Recovery
A backup is only valuable if it can be restored. Many businesses discover too late that a backup job was incomplete, corrupted, inaccessible, or too slow to meet their required recovery window.
Use the 3-2-1 approach as a baseline: keep at least three copies of important data, stored on two different types of media, with one copy kept offsite. For critical environments, an immutable backup adds another layer of protection by preventing backup data from being changed or deleted for a defined retention period. This is particularly valuable when ransomware attackers target backup repositories.
Separate backup from synchronization. A synchronized cloud folder can quickly copy an accidental deletion or encrypted ransomware file across devices. It may help with collaboration, but it is not a substitute for versioned, independently recoverable backups.
Microsoft 365 is another common gap. Email, OneDrive, SharePoint, and Teams data may be available through the platform, yet businesses still need a clear retention and recovery strategy for deleted items, compromised accounts, and long-term data requirements. Verify what your licensing includes and what it does not.
Write the Disaster Recovery Runbook
The disaster recovery runbook is the practical part of the plan. It should tell the right people what to do during the first hour, the first day, and the recovery period that follows. Keep it clear enough that a capable person can follow it without relying on memory.
Begin with incident declaration criteria. Who can declare a disaster? A single failed workstation is a support issue. A ransomware event, server-room failure, extended power outage, or major cloud service interruption may require the full recovery process.
Then define roles. One person should coordinate the technical response, while a business leader makes priority decisions and a designated communicator updates employees, customers, vendors, or regulators when needed. In a small company, one person may hold multiple roles, but every responsibility should have a backup.
The runbook should state the restoration order. In many environments, that order begins with internet connectivity, firewall and network services, identity and access, core servers or cloud services, line-of-business applications, and user workstations. Your order may differ, but it must match the business impact analysis completed earlier.
Include decision points, not just technical steps. For example, if a physical server cannot be restored within the RTO, should the business fail over to cloud-hosted infrastructure? If the office is unavailable, when should staff shift to remote work? Clear decisions reduce delay when every minute matters.
Plan for People and Communications
Technology recovery is only part of business continuity. Employees need to know where to work, how to access systems, and who will provide direction. Customers need appropriate updates if service levels or delivery schedules are affected.
Create an out-of-band communication method that does not rely on the systems that may be down. This could be a phone tree, emergency messaging platform, or designated group text process. Keep emergency contact lists current and test them periodically.
For remote work continuity, confirm that key employees have company-managed devices, secure remote access, multifactor authentication, and enough bandwidth to perform essential tasks. If your team works from a single location, identify an alternate workspace or confirm which functions can operate remotely. A recovery plan that assumes everyone can work from home may fall apart if critical paper files, specialized equipment, or local phone systems are required.
Test the Plan Before You Need It
Testing is where disaster recovery becomes credible. A plan that has not been tested is an assumption.
Start with a tabletop exercise. Walk through a realistic scenario such as ransomware, a failed server, or an extended building outage. Ask each participant what they would do, who they would contact, and what information they would need. These sessions often expose missing passwords, unclear ownership, unsupported applications, and conflicting priorities.
Then test actual restoration. Recover representative files, restore a virtual machine, validate application data, and confirm that employees can sign in and work. Periodically test a larger recovery scenario for systems with aggressive RTOs. Measure how long each stage takes and compare the result to your target.
Testing can reveal uncomfortable realities, such as backups that take too long to restore or a critical application that depends on an undocumented legacy server. That is a successful test. Finding the weakness during a controlled exercise is far less costly than discovering it during an outage.
Keep the Plan Current as Your Business Changes
A disaster recovery plan has a shelf life. New employees, software changes, office moves, acquisitions, hardware replacements, and new cloud services can all change the recovery process. Review the plan at least annually and after any significant infrastructure change or real incident.
Update contact lists, recovery priorities, vendor information, and network documentation. Review whether your RTO and RPO targets still reflect the business. Growth often makes a once-acceptable 24-hour recovery window unacceptable.
For businesses without an internal IT team, a managed services partner can provide the monitoring, backup oversight, documentation, and testing discipline that keeps recovery planning active rather than forgotten. Infedo Network Solutions helps businesses turn backup and continuity requirements into tested processes designed around their operations and budget.
The best time to find a recovery gap is on an ordinary workday, with the right people in the room and time to fix it. Build the plan, test it honestly, and treat every result as a chance to protect the next business day.