Microsoft Connectors missing after loading Knowledge Work Plugin (Google Vertex AI environment)

Problem Description After installing the Knowledge Work plugin by adding the GitHub repository URL in the Plugins configuration, non-Microsoft connectors load correctly, but no Microsoft connectors (e.g., M365, Outlook, SharePoint) appear in the available connectors menu.

Environment & Context

• Deployment / LLM Host: Google Vertex AI
• Identity Provider for Microsoft: Microsoft Account / Azure AD (Entra ID)
• Platform: Claude Cowork / Claude Code

Expected Behavior Microsoft connectors should display in the available connectors list, prompting for Microsoft OAuth/Azure AD authentication regardless of the underlying LLM provider (Google Vertex AI).

Actual Behavior Microsoft connectors do not render or list as available options.

Questions / Additional Configuration Guidance Needed

• Does hosting via Google Vertex AI suppress Microsoft authentication endpoints by default? If so, how do I enable Microsoft connectors?
• What environment variables or Azure App Registrations (Client ID / Tenant ID) need to be configured to expose Microsoft connectors when running on Vertex AI?