Microsoft 365 Governance Review — Clinical Research Organization

The sponsoring audit finding referenced access controls broadly — external sharing configuration, user account governance, and audit logging status were each noted as areas requiring review, without specific remediation guidance provided. The organization's internal IT function had limited capacity to conduct a structured governance assessment and lacked the documentation baseline required to respond to audit findings with evidence-based configuration records. The engagement was structured to close this gap: produce a documented governance baseline, identify specific configuration gaps, prioritize remediation by operational risk, and deliver configuration evidence that could support future sponsor audit responses.

The organization operated multiple simultaneous sponsor engagements, with staff distributed across internal teams and external collaborators requiring varying levels of access to study documentation, regulatory correspondence, and operational systems. Microsoft 365 served as the primary platform for sponsor communication, document management, and internal coordination. The tenant had grown organically over several years without a structured governance review, accumulating configuration defaults that had never been assessed against the organization's operational and regulatory requirements.

The primary operational risk was an accumulation of configuration defaults — Microsoft 365 settings that had never been actively reviewed or adjusted since tenant deployment. Default configurations in Microsoft 365 are optimized for deployment speed, not operational maturity. In a multi-sponsor environment where study collaboration environments share a single tenant, permissive defaults create access exposure that accumulates invisibly as the organization grows and adds guest accounts, SharePoint sites, and Teams environments without a governing review process. Secondary risks included the absence of independent backup coverage for Microsoft 365 workloads and an unverified audit logging posture that could not produce evidence for a sponsor audit records request.

• 1External sharing was configured at the tenant level rather than per study site, allowing any SharePoint site owner to enable external sharing independently. In a multi-sponsor environment, this configuration creates the risk of cross-sponsor data exposure in collaboration environments that were intended to be isolated — and the exposure accumulates without central visibility unless tenant-level sharing activity is actively monitored.
• 2Multi-factor authentication had been enabled for user registration but was not enforced via Conditional Access policy. Per-user MFA registration settings can be bypassed through legacy authentication protocols, or simply not triggered when users access the tenant through applications that do not invoke the MFA prompt. MFA registration without Conditional Access enforcement provides inconsistent protection.
• 3Unified audit logging status had not been verified since tenant deployment. The organization could not confirm whether sign-in events, administrative actions, file access, and sharing activity were being captured for all Microsoft 365 workloads — meaning it could not produce the audit trail evidence that a sponsor audit records request would require.
• 4No independent backup coverage existed for Microsoft 365 workloads including Exchange Online, SharePoint, and Teams. The organization operated under the assumption that Microsoft 365 native retention features provided equivalent protection — a misunderstanding of Microsoft's published shared responsibility model, which explicitly places cloud data backup responsibility with the customer.
• 5Guest account lifecycle management had no documented review or removal process. Accounts associated with completed sponsor engagements, former collaborators, and concluded projects remained active in the tenant without a defined offboarding procedure or a scheduled access review cycle.

Governance baseline documentation produced covering identity, access, collaboration, compliance, and backup domains. Conditional Access enforcement deployed, external sharing governance restructured per study site, independent backup coverage established, and audit logging verified across all workloads.

1. 1Conditional Access policy configured to enforce MFA for all users across all cloud applications, replacing per-user MFA registration settings. Policy scope documented with break-glass account exclusions recorded and access to those accounts restricted to documented emergency scenarios only.
2. 2SharePoint external sharing settings restructured from tenant-wide permissive defaults to per-site governance, with a defined approval workflow for enabling external sharing in study-specific document libraries. Tenant-level sharing set to the most restrictive setting permitted by operational requirements.
3. 3Unified audit log verification completed across all Microsoft 365 workloads — Exchange Online, SharePoint, Teams, OneDrive, and Azure AD — with a documented verification procedure and a scheduled quarterly confirmation check established.
4. 4Third-party Microsoft 365 backup solution evaluated and deployed, covering Exchange Online, SharePoint, OneDrive, and Teams. Recovery procedures documented at the workload level, and an initial recovery test conducted and documented for each covered workload.
5. 5Guest account review conducted across the tenant. Accounts associated with concluded engagements disabled and scheduled for removal following a documented grace period. Guest account onboarding and offboarding procedure documented for future sponsor engagement lifecycle management.