Small Business Cybersecurity Checklist for Ontario Businesses
Cyber attacks against small businesses in Ontario have grown sharply, and the most damaging incidents almost always exploit basic gaps that could have been closed in an afternoon. Use this checklist to verify your business has the security fundamentals in place whether you're operating in Greater Sudbury, Parry Sound, or anywhere else in the province.
Identity and access
- Multi-factor authentication enforced on every Microsoft 365 and Google Workspace account
- Unique strong passwords stored in a business password manager
- Admin accounts separated from day-to-day user accounts
- Conditional access policies blocking sign-ins from outside Canada (unless required)
- Former staff accounts disabled within 24 hours of departure
Endpoint and device security
- Business-grade endpoint protection on every workstation, laptop, and server
- Operating system and third-party patches applied within 14 days
- Full-disk encryption (BitLocker / FileVault) enabled on mobile devices
- Mobile device management for company-owned phones and tablets
- USB and removable-media policies configured
Email and phishing protection
Email is still the number-one entry point for ransomware and business email compromise in Ontario. Make sure these controls are in place.
- Advanced anti-phishing and safe-link policies enabled in Microsoft 365
- SPF, DKIM, and DMARC published and aligned for your domain
- External-sender warnings displayed on inbound emails
- Quarterly phishing simulations and staff awareness training
Not sure where your security gaps are?
Our free cybersecurity risk assessment scores your posture across MFA, backup, endpoint protection, and email security, then hands you a prioritized fix list.
Talk to a Security SpecialistBackup and recovery
- Daily backups of workstations and servers stored off-site
- Dedicated backup for Microsoft 365 mailboxes, OneDrive, SharePoint, and Teams
- Backups tested by full restore at least quarterly
- Documented recovery time and recovery point objectives
Network and Wi-Fi
- Business-class firewall with active threat-prevention licensing
- Separate guest Wi-Fi network isolated from internal resources
- Remote access via VPN or Zero Trust gateway, never exposed RDP
- Network equipment firmware updated quarterly
Policy and incident response
- Written acceptable-use and password policies signed by staff
- Documented incident response plan with named contacts
- Cyber insurance policy in place with controls that meet insurer requirements
- Annual cybersecurity review with your IT provider
Frequently asked questions
What's the single most important cybersecurity control for a small Ontario business?
Multi-factor authentication on all Microsoft 365 and Google Workspace accounts. It blocks the vast majority of credential-theft attacks and is usually free to enable.
Do small businesses actually get targeted?
Yes. Most attacks are opportunistic and automated, so small businesses in Sudbury or Parry Sound get scanned and attacked alongside large enterprises. Many attackers specifically target smaller organizations because their security is weaker.
Is Microsoft 365 backed up automatically?
No. Microsoft replicates data for service availability but does not protect you from accidental deletion, ransomware, or malicious insiders. A dedicated third-party Microsoft 365 backup is required.
Joshua Arimoro
Joshua Arimoro is the Principal Consultant at Nickel City Tech Solutions, a managed IT and cybersecurity provider based in Lively, Ontario, serving businesses across Greater Sudbury and Northern Ontario. He works hands-on with Microsoft 365, server and network infrastructure, endpoint management, and backup and recovery for small and mid-sized organisations.
More about our teamWant help working through this checklist?
We'll audit your environment and deliver a written cybersecurity gap report tailored to your Ontario business.
Technologies mentioned in this article
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Related services, locations, and resources
Related services
- Cybersecurity Services
Endpoint protection, MFA, email filtering, and M365 hardening.
- Managed IT Services
Proactive monitoring, patching, and predictable monthly support.
- Microsoft 365 Support
Exchange, Teams, SharePoint, OneDrive, and licensing.
- Backup & Disaster Recovery
Backup strategy, monitoring, and recovery testing.
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