B2B Platform Security Testing: Multi-Tenant Portals, EDI, and Partner Integrations للمؤسسات العربية

B2B platforms — partner portals, supplier management systems, EDI gateways, procurement platforms — connect multiple organisations with varying security postures. Testing covers: tenant isolation between business partners, role-based access control across organisational boundaries, data sharing controls (can Partner A see Partner B's data?), API integration security with partner systems, document exchange security (EDI, XML), authentication federation between organisations, and audit logging across multi-party transactions.