Function parseConfig

Parse Outlook server configuration from CLI arguments and environment.

CLI Arguments (all optional):

• --auth= Authentication mode (default: loopback-oauth) Modes: loopback-oauth, device-code, dcr
• --headless Disable browser auto-open, return auth URL instead
• --redirect-uri= OAuth redirect URI (default: ephemeral loopback)
• --tenant-id= Microsoft tenant ID (overrides MS_TENANT_ID env var)
• --dcr-mode= DCR mode (self-hosted or external, default: self-hosted)
• --dcr-verify-url= External verification endpoint (required for external mode)
• --dcr-store-uri= DCR client storage URI (required for self-hosted mode)
• --port= Enable HTTP transport on specified port
• --stdio Enable stdio transport (default if no port)
• --log-level= Logging level (default: info)
• --storage-dir= Directory for CSV file storage (default: .mcp-z/files)
• --base-url= Base URL for HTTP file serving (default: http://localhost for HTTP transports)

Environment Variables:

• MS_CLIENT_ID OAuth client ID (REQUIRED)
• MS_TENANT_ID Microsoft tenant ID (REQUIRED)
• MS_CLIENT_SECRET OAuth client secret (optional)
• AUTH_MODE Default authentication mode (optional)
• HEADLESS Disable browser auto-open (optional)
• DCR_MODE DCR mode (optional, same format as --dcr-mode)
• DCR_VERIFY_URL External verification URL (optional, same as --dcr-verify-url)
• DCR_STORE_URI DCR storage URI (optional, same as --dcr-store-uri)
• PORT Default HTTP port (optional)
• LOG_LEVEL Default logging level (optional)
• STORAGE_DIR Directory for CSV file storage (optional)
• BASE_URL Base URL for HTTP file serving (optional)

OAuth Scopes (from constants.ts): openid profile offline_access https://graph.microsoft.com/User.Read https://graph.microsoft.com/Mail.ReadWrite https://graph.microsoft.com/Mail.Send https://graph.microsoft.com/MailboxSettings.ReadWrite