Microsoft 365 Account Takeover Protection
One compromised account can expose email, files, and the settings that control the whole organization. We cut the chance of takeover and know what to check.
What to Look For
Signs the account needs more than a password reset
One sign may have an innocent explanation. A pattern is a reason to check before the organization has to make a decision under pressure.
- A user sees unfamiliar sign-ins, devices, travel alerts, or repeated MFA prompts.
- A connected application receives access to email, files, or the directory without a clear owner.
- Forwarding, mailbox rules, delegates, or sent messages do not match what the user did.
- Older sign-in methods or broad policy exceptions provide another way into the account.
- The usual response stops at a password reset and does not revoke sessions or check what the attacker changed.
How to Start
Choose the right first step
Start with a focused review when the question is specific. Choose ongoing service when the organization wants the controls monitored and maintained.
Microsoft 365 Security & Governance Review
Start with a one-time review of identity, email, sharing, applications, backup, and administrator access across the tenant.
See the scopeOngoing protectionManaged Security & Compliance
Use this when the organization also wants ongoing sign-in monitoring, email protection, backup, and human investigation.
See the scopeWhat We Do
How we keep one account from becoming an organization-wide problem
Each change has a clear purpose, a named owner, and a record the organization can use later.
Conditional Access and stronger sign-in
We set practical rules for staff, administrators, devices, locations, older sign-in methods, and emergency access. Sensitive roles move to phishing-resistant options first, with a recovery path that does not weaken the protection.
Monitoring risky sign-ins and sessions
We watch Entra ID for risky users, unusual sign-ins, and token activity, then investigate using a response path agreed with the organization in advance.
Control over connected applications
We limit who can approve new applications, review the access each application requests, and make sure a real person owns the business decision.
Checking the mailbox for access left behind
Every investigation includes forwarding, inbox rules, delegates, message handling, and mailbox history. These are common places for an attacker to keep access or hide activity.
A complete account response
We revoke sessions and tokens, secure the account, remove access the attacker left behind, review what was touched, and keep a record of the response.
Fit
Is this the right place to start?
A useful engagement is clear about the problem it solves and the decisions that remain yours.
A good fit for organizations that
- Run email, files, identity, and collaboration on Microsoft 365.
- Have years of settings, exceptions, and connected applications that nobody has reviewed as a whole.
- Want someone watching for account misuse after the initial security review is complete.
Important limits
- If an account may be compromised now, start incident response. A planned review can wait.
- The Microsoft licences you hold affect which native safeguards are available, so the design has to match your environment and budget.
- A live compromise may create legal, insurance, privacy, and client obligations. Those decisions remain with your counsel, insurer, and leadership.
FAQ
Questions owners and partners usually ask
Straight answers to settle scope, responsibility, and expectations before the work starts.
Is a password reset enough after a Microsoft 365 account is compromised?
Usually not. Active sessions, connected applications, forwarding, inbox rules, delegates, recovery methods, and any email or files the attacker reached may also need to be reviewed.
What is Conditional Access?
It is the Microsoft 365 decision layer that determines who can sign in and what they must prove based on their role, device, location, application, and risk. MFA is one of the requirements it can apply.
Can someone get around MFA?
Yes. Stolen sessions, convincing fake login pages, repeated approval prompts, weak recovery methods, and excluded accounts can all create a path around weaker MFA setups.
Can you work with our current IT provider?
Yes. We can work alongside internal IT or another provider when access, day-to-day responsibility, escalation, and authority during an incident are clearly assigned.
Know who can reach the organization through Microsoft 365.
We review the tenant, close the account takeover gaps, and watch the identities that control email, files, and administration.