9 risks hiding in an unaudited Microsoft 365 tenant
Most Microsoft 365 tenants were set up to get people working, not to be secure. Years of admin changes, vendor onboarding and quick fixes leave gaps nobody notices until something goes wrong. Here is what a CISO-led audit actually finds.
Global Admins without phishing-resistant MFA
A single compromised admin password can open every mailbox, every file library and every payment workflow in the tenant.
Legacy authentication left enabled
Older protocols bypass modern Conditional Access and MFA entirely, and attackers scan for them specifically.
Forgotten inbox forwarding rules
A rule set once during an incident, or planted silently by an attacker, can quietly copy every email to an outside address for months.
Weak SPF, DKIM or DMARC enforcement
Without strict domain authentication, your domain is easier to spoof in convincing phishing sent to your own customers and vendors.
Anonymous or "anyone with the link" sharing left on
SharePoint, OneDrive and Teams files can end up reachable well beyond the people who were meant to see them.
Guest accounts that were never removed
Contractors and former partners often keep standing access to Teams and files long after the project ends.
No sensitivity labels or DLP on financial and HR data
Sensitive files move freely between people, devices and outside sharing with nothing to flag or block it.
Audit logging not retained long enough
If an incident is discovered months later, short log retention means the evidence needed to investigate it may already be gone.
No tested backup or ransomware recovery plan
Native retention is not a backup. Without a tested recovery plan, a ransomware event or accidental deletion can mean real data loss.
200 read-only checks across 8 control domains
Ali reviews identity, admin access, email security, domain authentication, collaboration, data protection, logging, and device/recovery controls — with read-only access only. Nothing in your tenant is changed.
See the full 200-point checklist →