A Microsoft 365 security assessment should reveal how an attacker, a compromised account, or an accidental sharing decision could reach business email, files, conversations, applications, devices, and administrative controls. The review needs to examine effective access and real operating behavior, not only whether a few recommended settings are enabled. It should also show whether the organization can investigate an event, contain it, restore affected data, and keep essential work moving.
Microsoft 365 connects Microsoft Entra ID, Exchange Online, Teams, SharePoint, OneDrive, Microsoft Defender, Intune, Purview, Power Platform, third-party applications, and user devices. A weakness in one layer can alter risk in another. For example, strong email filtering does not correct an unprotected administrator, and a compliant laptop does not prevent an old guest account from retaining access to a sensitive team site.
ALLMSP performs Microsoft 365 security assessments and remediation in house for organizations in Lawrenceville, Suwanee, Gwinnett County, Metro Atlanta, and throughout Georgia. We connect identity, email, collaboration, endpoint, data, audit, backup, response, documentation, and user support under one accountable security plan.
Turn Microsoft 365 security data into a prioritized correction plan
- Confirm scope: Identify tenants, verified domains, licenses, administrators, users, guests, applications, devices, mailboxes, teams, sites, data, and owners.
- Protect identity: Review privileged roles, multifactor authentication, Conditional Access, legacy authentication, emergency access, sign-ins, and risky identities.
- Secure communication: Inspect mail flow, accepted domains, forwarding, inbox rules, anti-phishing, impersonation, Safe Links, Safe Attachments, Teams, and external access.
- Control files and apps: Evaluate SharePoint, OneDrive, guest sharing, links, groups, application consent, Power Platform connections, sensitivity, and retention.
- Validate devices and evidence: Review enrollment, compliance, endpoint protection, audit status, log retention, alert routing, investigation access, backup, and restoration.
- Remediate by risk: Correct reachable attack paths first, test user workflows, document exceptions, retain proof, and schedule recurring access and posture reviews.
Inventory the tenant and secure identities with administrative power
Begin by confirming the authoritative Microsoft 365 tenant, verified domains, subscription ownership, billing contacts, support access, and emergency contacts. Export licensed and unlicensed users, shared mailboxes, guests, groups, enterprise applications, app registrations, devices, and administrative role assignments. Reconcile active identities with employment and business-owner records. Investigate departed users, duplicate accounts, dormant guests, unlicensed accounts that still own resources, service accounts used interactively, and applications with no accountable owner.
Review Microsoft Entra directory roles, role-assignable groups, permanent and eligible privilege, direct assignments, administrative units, and sign-in history. Protect administrators with separate privileged accounts, phishing-resistant authentication where practical, Conditional Access appropriate to licensing and risk, alerts, and routine access review. Maintain protected emergency accounts that can work during identity or federation failure, then test them on a schedule. Evaluate ordinary user authentication, self-service password reset, legacy protocols, risky sign-ins, impossible travel signals, unfamiliar locations, and registration methods without assuming that an enrolled method proves every sign-in is protected.
- Tenant ownership: Record domains, subscriptions, billing authority, support access, privacy contacts, emergency contacts, and accountable administrators.
- Identity inventory: Reconcile employees, contractors, guests, shared accounts, service identities, applications, status, owner, last activity, and business need.
- Privileged access: Limit role scope and duration, protect administrators, review activation and sign-in evidence, and remove stale assignments.
- Authentication: Assess multifactor methods, Conditional Access coverage, exclusions, legacy access, device conditions, session controls, and recovery.
- Emergency access: Maintain independent cloud-only accounts with secured credentials, alerting, exclusions based on tested scenarios, and documented use.
Identity review is complete when the organization knows every path to administrative power, why it exists, how it is protected, and how access can be recovered during an outage.
Trace email, Teams, SharePoint, OneDrive, application, and device exposure
Inspect Exchange Online accepted domains, connectors, transport rules, remote domains, automatic forwarding, inbox rules, delegates, shared mailboxes, mail-enabled groups, authentication records, and administrative roles. Review anti-spam, anti-malware, anti-phishing, impersonation, Safe Links, Safe Attachments, quarantine, user submissions, and outbound protections according to the organization’s licensing. Apply Microsoft preset security policies only after understanding policy precedence, recipient scope, exceptions, false-positive handling, and the business workflows that must continue. Test protected users, executive names, owned domains, common attachment types, suspicious links, and the process for releasing or escalating a message.
For Teams, SharePoint, and OneDrive, review organization and site-level sharing, default link types, anonymous links, guest access, external access, sensitivity labels, group ownership, private and shared channels, unmanaged-device access, sync, download, and retention. Follow access from Microsoft Entra groups through Teams membership to the connected SharePoint site and any separately shared file or folder. Review application consent, enterprise applications, OAuth permissions, Power Automate connections, and third-party backup or security tools. Compare device registration, Intune enrollment, compliance, Defender health, encryption, operating-system support, and local administrator exposure with the access policies that rely on those signals.
- Email path: Review domains, DNS authentication, connectors, forwarding, rules, delegates, impersonation protection, malicious content controls, and outbound abuse.
- Collaboration access: Inspect Teams membership, guests, external chat, channels, SharePoint sites, OneDrive sharing, anonymous links, and group owners.
- Applications: Inventory consent grants, enterprise applications, service principals, permissions, credentials, owners, activity, and data destinations.
- Data controls: Review sensitivity, retention, deletion, download, sync, sharing, unmanaged access, high-risk records, and legal requirements.
- Endpoints: Validate enrollment, compliance, encryption, Defender status, updates, local privilege, supported systems, and access-policy enforcement.
The technical controls should be tested as a connected path from sign-in through message, meeting, application, device, site, file, export, and external recipient.
Use Secure Score, audit evidence, backup, and incident exercises correctly
Microsoft Secure Score is a useful source of recommendations and trend data, but it is not a complete risk assessment. Review each action against current licenses, user impact, existing compensating controls, attack-path relevance, and business priority. Confirm that completed actions truly cover the intended people, devices, and services. Record accepted risk with an owner, reason, compensating control, expiration date, and review schedule. Give early attention to exposed administrators, weak sign-in paths, unsafe forwarding, application permissions, unprotected high-value users, uncontrolled sharing, unmanaged endpoints, and missing evidence.
Verify that Microsoft Purview auditing is enabled for the tenant and that required activities are retained for the period the business expects. Licensing affects available events and retention, so test searches for administrator changes, mailbox activity, sharing, Teams events, application consent, role assignments, file access, and other high-value actions. Route actionable Defender, Entra, Exchange, endpoint, data, and service-health alerts to a monitored queue with escalation. Rehearse account compromise, phishing, malicious consent, exposed data, lost device, destructive administrator action, unavailable tenant administration, and data restoration. Confirm authority, evidence access, containment, communication, backup scope, recovery time, and business validation.
- Risk prioritization: Use attack path, exploitability, privilege, data sensitivity, user impact, business criticality, detection, and recovery capability.
- Audit readiness: Verify status, permissions, event coverage, retention, search procedures, time range, export, and secure investigation access.
- Alert operations: Define signal, severity, route, owner, response time, escalation, evidence, containment authority, and closure test.
- Backup and recovery: Identify protected workloads, retention, isolation, administrator access, restore methods, dependencies, and tested results.
- Exercise: Run realistic identity, email, sharing, device, application, and recovery scenarios, then correct observed gaps and repeat the test.
A Microsoft 365 assessment has succeeded when the highest-risk paths are corrected and the organization can detect, investigate, contain, recover, and prove the new state.
Microsoft 365 security assessment and remediation from ALLMSP
ALLMSP can inventory the Microsoft 365 tenant, review Entra identity and privilege, assess email and collaboration security, inspect application permissions, validate endpoints, search audit evidence, test alert routing, and evaluate backup and response readiness. We convert the findings into prioritized technical work tied to business risk rather than delivering a generic score report.
Our in-house team can implement approved changes across identity, Exchange Online, Defender for Office 365, Teams, SharePoint, OneDrive, Intune, Microsoft Defender, Purview, applications, backup, documentation, and user training. We test ordinary workflows after remediation, retain closure evidence, and provide continuing support through the same accountable team.
- Assess: Review identities, privilege, email, collaboration, applications, data, endpoints, evidence, backup, and incident readiness.
- Correct: Implement prioritized controls with pilot testing, communication, rollback, user validation, and documented exceptions.
- Maintain: Monitor posture, review access, investigate alerts, test recovery, train users, and adapt controls as the tenant changes.
Official Microsoft guidance for a Microsoft 365 security review
Use Microsoft’s current product guidance to verify configuration and licensing, then test the controls against the organization’s real users, devices, data, external relationships, and recovery requirements.
- Microsoft Secure Score. Explains posture measurement, recommended actions, partial completion, alternate mitigations, and the need to balance protection with usability.
- Microsoft Entra Conditional Access. Describes the identity-driven policy engine for applying access decisions from users, resources, devices, locations, and risk signals.
- Emergency access accounts. Provides current guidance for independent emergency identities, exclusions, monitoring, and recurring sign-in tests.
- Microsoft Defender for Office 365 deployment. Organizes email and collaboration protection across anti-phishing, Safe Links, Safe Attachments, policy precedence, and reporting.
- SharePoint and OneDrive external sharing. Explains organization and site-level sharing, Microsoft Entra B2B integration, guest behavior, and access removal.
- Microsoft Purview audit search. Covers audit-search permissions, search jobs, event data, and retention behavior according to Microsoft 365 licensing.
Microsoft 365 security assessment FAQs
What is included in a Microsoft 365 security assessment?
A complete review can include tenant ownership, users, administrators, multifactor authentication, Conditional Access, email security, Teams, SharePoint, OneDrive, applications, devices, audit logs, alerts, backup, recovery, and incident response.
Is Microsoft Secure Score the same as a security assessment?
No. Secure Score provides useful recommendations and trends, but an assessment must add effective access, attack paths, business impact, user workflows, licensing, applications, recovery, and verification of the actual environment.
Does every Microsoft 365 user need multifactor authentication?
All users should have appropriate strong authentication. The exact method and Conditional Access design should account for risk, licensing, devices, emergency access, service identities, accessibility, and business continuity.
How should Microsoft 365 administrator accounts be protected?
Use separate privileged identities, strong authentication, limited role scope and duration, monitored sign-ins, reviewed assignments, protected workstations where appropriate, and tested emergency accounts.
What should be reviewed in Microsoft 365 email security?
Review domains, DNS authentication, connectors, forwarding, mailbox rules, delegates, anti-spam, anti-malware, anti-phishing, impersonation, Safe Links, Safe Attachments, quarantine, user reporting, and outbound abuse.
How is external sharing reviewed in Teams and SharePoint?
Trace guests, group membership, team ownership, channel type, connected SharePoint sites, site sharing levels, individual links, anonymous access, expiration, device controls, and retained business need.
Why should Microsoft 365 application permissions be audited?
An enterprise application or consent grant can read or change mail, files, profiles, and other data outside the interface users recognize. Review permission scope, owner, credentials, activity, publisher, destination, and removal path.
Are Microsoft 365 audit logs enabled automatically?
Audit behavior depends on the tenant and licensing. Microsoft notes that auditing may require manual enablement for some small and medium business subscriptions, so verify status and test the events the organization expects to investigate.
Can ALLMSP implement all recommended Microsoft 365 security changes?
Yes. ALLMSP can complete assessment, configuration, remediation, testing, documentation, training, monitoring, backup, restoration, and continuing support in house.
Where does ALLMSP provide Microsoft 365 security services?
ALLMSP serves Lawrenceville, Suwanee, Gwinnett County, Metro Atlanta, and organizations throughout Georgia through local and remote Microsoft 365 security support.
