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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.

May 10, 2026 9 min read Greater Sudbury & Ontario

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

Backup 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 really get targeted?

Yes. Most attacks are opportunistic and automated, which means small businesses in Sudbury or Parry Sound are 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.

Want help working through this checklist?

Our team will audit your environment and deliver a written cybersecurity gap report tailored to your Ontario business.

Request a Cybersecurity Assessment 705-905-3126
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