M365 Governance That Protects
Patients, Not Just Data
Health systems, payers, and life sciences organizations use Microsoft 365 to coordinate care, manage operations, and accelerate research. Every one of those workloads creates PHI exposure risk. Polaris builds the governance controls that let clinicians collaborate freely while keeping your HIPAA obligations met and your HHS audit risk contained.
HHS Enforcement Alert: The HHS Office for Civil Rights is actively investigating AI tool use in healthcare settings. OCR has stated that covered entities using AI tools like Microsoft 365 Copilot must ensure those tools do not create impermissible PHI disclosures. Governance documentation is a prerequisite for demonstrating compliance.
Five M365 Governance Risks Every Healthcare Organization Faces
HIPAA enforcement actions consistently cite access control failures, inadequate risk analysis, and insufficient workforce access management as the leading causes of civil monetary penalties. All three manifest directly in M365 environments.
PHI in SharePoint and OneDrive
45 CFR § 164.312(a)(1)Clinical staff routinely save patient records, lab results, and care coordination documents to SharePoint and OneDrive — often in broadly accessible sites. A single overshared SharePoint site containing PHI can constitute a reportable breach under the HIPAA Breach Notification Rule, triggering HHS reporting obligations and potential civil monetary penalties averaging $1.9M per incident.
Microsoft 365 Copilot Surfacing PHI
HIPAA Minimum Necessary StandardMicrosoft 365 Copilot honors existing M365 permissions. If a clinician, administrator, or contractor has inherited access to SharePoint sites containing PHI, Copilot will surface that PHI in AI-generated summaries, answers, and documents — often without the user realizing the underlying source. Deploying Copilot in a healthcare environment without prior permission remediation almost certainly violates the HIPAA Minimum Necessary standard.
Business Associate Access Through M365
45 CFR § 164.308(b)(1)Healthcare organizations increasingly extend M365 access to business associates — billing companies, coding vendors, EHR implementation partners, and health IT consultants. Each external guest with access to SharePoint or Teams workspaces containing PHI requires a signed Business Associate Agreement and documented access controls. Most healthcare M365 tenants lack systematic tracking of BA access.
Microsoft Teams for Clinical Communications
HIPAA Security Rule / Transmission SecurityClinical teams have widely adopted Microsoft Teams for care coordination, handoffs, and patient communication. While Teams itself is HIPAA-eligible with a signed BAA from Microsoft, the governance of who can access clinical channels, how messages are retained, and whether PHI shared in Teams is subject to DLP controls is entirely the covered entity's responsibility — and most health systems' Teams environments are not configured to meet this obligation.
Former Employee Access and Termination Gaps
45 CFR § 164.308(a)(3)High turnover in healthcare — particularly among nursing staff, locum clinicians, and administrative personnel — creates persistent access risks. Former employees with active Microsoft accounts or unrevoked sharing links can access PHI indefinitely. The HIPAA Security Rule requires formal workforce access management; most healthcare M365 environments lack automated de-provisioning that covers SharePoint permissions, Teams memberships, and sharing links.
HIPAA Civil Monetary Penalty Tiers (2024 Inflation-Adjusted)
Annual penalty caps apply per violation category. Maximum annual penalty: $2,067,813 per violation category (Tier 4). Source: HHS OCR, 2024.
How Polaris Protects Healthcare Organizations
Every Polaris engagement for healthcare is led by practitioners with direct experience in HIPAA compliance, clinical operations, and Microsoft 365 administration.
PHI Exposure Assessment
Polaris scans your entire M365 tenant to identify where PHI resides, who has access to it, and whether that access is appropriate under HIPAA minimum necessary standards.
- Complete map of SharePoint sites, Teams channels, and OneDrive folders containing potential PHI indicators
- Access rights analysis showing every user, group, and external party with access to PHI-bearing locations
- Oversharing report identifying broadly accessible workspaces with PHI exposure
- HHS-aligned risk assessment document suitable for your HIPAA Security Officer review
Copilot Readiness for Healthcare
Our healthcare Copilot readiness program evaluates your M365 permissions landscape specifically against the risk profile of an organization subject to HIPAA, ensuring AI interactions do not surface PHI to unauthorized users.
- PHI accessibility map for every proposed Copilot user population
- Minimum necessary access analysis comparing current permissions to job function requirements
- Pre-Copilot remediation plan with prioritized permission corrections
- Ongoing Copilot governance framework for post-deployment monitoring
Business Associate Access Governance
We build and implement a systematic framework for managing business associate access to your M365 environment — from initial provisioning through access review, BAA documentation, and termination.
- Complete inventory of current business associate access across Teams, SharePoint, and Exchange
- BAA coverage assessment identifying BA relationships without corresponding access documentation
- Automated access review workflow for BA users on a quarterly or annual cadence
- De-provisioning runbook aligned to your HR and vendor management processes
HIPAA Security Rule Controls Mapping
Polaris maps your M365 configuration controls directly to HIPAA Security Rule requirements — providing the documented evidence your Security Officer needs for annual risk analysis and audit response.
- Technical safeguards assessment covering access control, audit controls, integrity controls, and transmission security
- Administrative safeguards documentation for M365-related workforce policies and procedures
- Gap analysis against HIPAA Security Rule administrative, physical, and technical safeguard categories
- Remediation roadmap prioritized by HIPAA risk level and implementation complexity
Regulatory Frameworks We Address in Healthcare
Your Next HHS Audit Is Already Scheduled
HHS OCR audits are no longer random — they are increasingly triggered by breach reports, patient complaints, and now AI tool adoption. Polaris gives your Security Officer the documented evidence needed to demonstrate good-faith compliance at every stage.