Microsoft 365 Security for Canadian SMBs
Microsoft 365 is the most targeted application suite for Canadian SMBs it handles email, identity, files, and communication. Quantm hardens your M365 environment against phishing, BEC, and identity attacks, then monitors it around the clock.
End-to-end M365 security coverage.
We cover the five layers of Microsoft 365 that attackers exploit first.
Conditional access policies, MFA enforcement, Privileged Identity Management, and admin account lockdown.
- Eliminate legacy authentication that bypasses MFA
- Enforce device compliance before granting access
- Detect impossible travel and anomalous sign-ins
Defender for Endpoint, Defender for Office 365, and Defender for Identity configured, monitored, and integrated into your SOC.
- Anti-phishing and safe links active on all mailboxes
- Threat policies tuned to your environment, not defaults
- Alert escalation to human analysts, not just automation
DMARC, DKIM, SPF validation, anti-spoofing rules, and transport rules to block common BEC patterns.
- Domain impersonation blocked before delivery
- Shared mailbox and forwarding rule audit
- External email warning banners and reply-to checks
External sharing controls, guest access review, and sensitivity labels applied across Teams and SharePoint.
- No accidental public file sharing
- Guest access reviewed quarterly
- Sensitivity labels on documents containing PII
We pipe Microsoft 365 audit logs into your SOC telemetry and alert on suspicious activity in real time.
- OAuth app consent abuse detected and revoked
- Mass download and unusual data exfiltration flagged
- Inbox rule manipulation (a top BEC indicator) alerted immediately
We track your Microsoft Secure Score and work through a prioritized hardening roadmap each quarter.
- Baseline Secure Score documented on day one
- Quarterly improvement targets agreed with your team
- Improvements documented for cyber insurance renewal
Common M365 misconfigurations we find
After hundreds of M365 assessments, these are the gaps that appear most consistently and that attackers exploit most often.
- Legacy authentication enabled Older protocols (IMAP, POP3, SMTP AUTH) bypass MFA. Found in over 70% of tenants we assess.
- No DMARC policy (or p=none) Domain is spoofable. Attackers can send email appearing to come from your domain.
- Forwarding rules set to external addresses A common post-compromise persistence technique. Typically set by attackers after account takeover.
- Global admin accounts without MFA Gives attackers full tenant control with a single compromised password.
- Guest access unrestricted External users can browse SharePoint sites and Teams channels they were never meant to see.
- Audit logging disabled Without audit logs, you cannot detect breaches or meet PIPEDA breach notification requirements.
What changes after an M365 security engagement.
You'll feel the difference fast fewer alerts, faster response, and a clearer picture of where your real risk lives.
- Phishing and BEC attempts blocked before they reach inboxes
- Compromised account takeovers detected and contained in minutes
- DMARC, DKIM, and SPF configured most SMBs are missing at least one
- Secure Score improved 20–40 points on average in the first 90 days
- Insurance renewal questionnaire answered with documented M365 controls
- Guest access and external sharing risks eliminated
How an M365 security assessment works.
Read-only access to your M365 tenant via delegated admin. No changes made without approval.
We assess all six areas: Entra ID, Defender, Exchange, Teams, SharePoint, and audit logging.
Written findings ranked by severity with specific remediation steps. Delivered within 5 business days.
We implement approved changes in a scheduled window. Most fixes take one to three days.
Common questions, answered.
The things buyers ask us most about scope, onboarding, and what you'll see in your monthly report.
Ask us anythingBook a free M365 security review.
We'll assess your tenant, show you where the gaps are, and give you a prioritized remediation roadmap no obligation to continue.