The problem in plain language
A supplier receives access to applications, groups, files or cloud resources. The engagement ends, but some accounts and entitlements remain because access removal was never connected to the supplier lifecycle.
What the buyer is actually trying to solve
The buyer needs external access to expire or be reviewed when the business justification ends—not months later during an audit or incident investigation.
Evidence and system mechanism
Microsoft Entra ID Governance documents access reviews for external identities and mechanisms to remove access that is no longer required. It also recommends review structures focused on guest and partner access. The underlying principle is durable sponsorship plus periodic or event-driven revalidation.
Supplier access is different from employee access because the authoritative lifecycle signal may live in procurement, contract management or a project register rather than HR.
Problem owner and why now
Security, risk and compliance teams typically own the control outcome; CIO, CRO and CFO budgets carry the exposure and assurance burden. Urgency rises after supplier changes, audit findings, incidents and new assurance requirements.
Economic consequence
Unnecessary external access expands exposure and increases review effort. The organisation should quantify affected identities, entitlements, critical systems and remediation time rather than using generic breach-cost claims.
Root cause
Common causes are no external identity sponsor, access without expiry, offboarding that covers only named employees, direct resource sharing outside governed groups, and supplier records that are disconnected from identity systems.
Practical intervention
- Inventory external identities and resource assignments.
- Assign a business sponsor for each supplier access relationship.
- Use expiry or review dates aligned with the engagement.
- Trigger access review when contracts, projects or supplier personnel change.
- Remove access automatically where policy permits and route exceptions for approval.
- Retain evidence of review and removal.
Diagnostic questions
- Can every external identity be linked to an active supplier relationship?
- Who sponsors the access?
- When does the business need expire?
- Which external accounts have not been reviewed recently?
- Can direct sharing bypass the governed review path?
What good looks like
External access has a sponsor, scope and lifecycle. When the relationship ends, the organisation can prove which access was removed, which exceptions remain and who approved them.
Where Mellorca fits
Mellorca can map supplier access flows, connect procurement/contract lifecycle signals to identity governance, design review workflows and establish managed control evidence.
Commercial next step
Discovery article → external-access diagnostic → supplier identity map → governance design → implementation → managed reviews.