One Email Suspended, Everything Down: The Dangers of OAuth Consolidation

When a business ties email, identity, and authentication to a single account with Google Workspace, account suspension becomes a company-wide crisis. The incident demonstrates how OAuth integration, while convenient, creates a fragile architecture where one security flag can disable payroll, sales systems, internal tools, and all business communications at once. This cautionary tale exposes the hidden cost of OAuth consolidation and raises critical questions about designing resilient systems.