generated: '2026-06-20'
method: searched
source: https://developer.microsoft.com/en-us/microsoft-365/dev-program
note: >-
  Microsoft Graph has no separate test/live key mode. The supported sandbox is a
  free Microsoft 365 developer tenant (isolated from production data) provisioned
  through the Microsoft 365 Developer Program, plus the Graph Explorer sign-in
  playground with pre-seeded sample data. No published magic/test values — never
  invent mailbox ids, tokens, or addresses.
sandbox:
  - name: Microsoft 365 Developer Program (instant sandbox)
    url: https://developer.microsoft.com/en-us/microsoft-365/dev-program
    description: >-
      Free, renewable Microsoft 365 E5 developer subscription with a configurable
      sandbox tenant (optionally pre-populated with sample users, mail, and
      calendar data) for building and testing Graph / Outlook integrations.
    isolation: dedicated developer tenant, separate from any production tenant
  - name: Graph Explorer
    url: https://developer.microsoft.com/en-us/graph/graph-explorer
    description: >-
      Browser playground that runs live Graph requests against either a built-in
      sample tenant (no sign-in required) or your own tenant, with the Outlook
      mail/calendar/contacts sample data set.
    sample_tenant: true
test_endpoints:
  production: https://graph.microsoft.com/v1.0
  preview: https://graph.microsoft.com/beta