> ## Documentation Index > Fetch the complete documentation index at: https://openworklabs.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Edit or reschedule an Outlook calendar event > Requires Calendars.ReadWrite and calendarWrite. Updates only supplied subject, body, location, or paired UTC start/end. Requires confirmNotifications: true because updates may email attendees. Uses only the calling member's delegated Microsoft 365 connection. Never automatically retry a mutation after a timeout, cancellation, or ambiguous response; inspect current state first. ## OpenAPI ````yaml /openapi.json patch /v1/capabilities/microsoft-365/calendar-events/{eventId} openapi: 3.1.0 info: title: Den API description: >- OpenAPI spec for the Den control plane API. Authentication: - Use `Authorization: Bearer ` for user-authenticated routes that require a Den session. - Use `x-api-key: ` for organization API-key calls. API keys resolve to the issuing user and the organization member they were scoped to when created, so they can call ordinary user and organization routes without a separate signed-in session. Example: `curl https://api.openworklabs.com/v1/me -H "x-api-key: den_..."`. - Session-only flows still require a signed-in user session, including organization creation, invitation acceptance, active-organization switching, and MCP token minting. - Public routes like health and documentation do not require authentication. Swagger tip: use the security schemes in the Authorize dialog to set either `bearerAuth` or `denApiKey` before trying protected endpoints. version: 0.18.46 contact: name: OpenWork url: https://openworklabs.com email: team@openworklabs.com license: name: OpenWork Enterprise Edition License url: https://github.com/different-ai/openwork/blob/dev/ee/LICENSE servers: - url: https://api.openworklabs.com security: - bearerAuth: [] - denApiKey: [] tags: - name: System description: >- Service health, readiness, API documentation, and desktop version metadata. - name: Authentication description: >- Sign-in discovery, administrator bootstrap, OAuth provider connections, and MCP token minting. - name: OAuth description: >- OAuth 2.0 / OpenID Connect authorization-server and protected-resource metadata and dynamic client registration (RFC 8414, RFC 9728, RFC 7591), used by MCP clients. - name: SCIM description: >- SCIM 2.0 provisioning endpoints for identity providers (RFC 7644) and the organization SCIM connector management routes. - name: SSO description: Organization single sign-on connector management routes. - name: Bootstrap description: Agent-first provisional workspace setup routes. - name: Users description: Current user and membership routes. - name: Organizations description: Organization creation, context, brand assets, and install links. - name: Invitations description: Invitation preview, acceptance, creation, and cancellation routes. - name: Members description: Organization member management routes. - name: Roles description: Organization custom role management routes. - name: Teams description: Organization team management routes. - name: API Keys description: Organization API key management routes. - name: Desktop Policies description: Desktop app policies applied to the organization, members, or teams. - name: LLM Providers description: Organization LLM provider catalog, configuration, and access routes. - name: Inference description: Organization inference settings. - name: Cloud description: Organization Cloud instance lifecycle and browser gateway resolution. - name: Workers description: Worker lifecycle, billing, and runtime routes. - name: Worker Runtime description: Worker runtime inspection and upgrade routes. - name: Worker Activity description: Worker heartbeat and activity reporting routes. - name: Automations description: Scheduled Automations, their runs, and desktop runner presence. - name: Workflows description: Saved Workflows (Code Mode scripts), their versions, snapshots, and views. - name: Workflow Runs description: Durable Workflow run history. - name: Codemode Runs description: Generated Artifact views produced by Code Mode runs. - name: Apps description: >- Saved reusable apps built from Workflows and Artifact views, and their sharing. - name: Config Objects description: >- Versioned configuration objects (skills, workflows, and other plugin content). - name: Plugins description: Plugin packages, access grants, and imports. - name: Marketplaces description: Marketplaces that distribute plugins to members and teams. - name: Resources description: >- Aggregated snapshot of the resources and marketplace capabilities available to the caller. - name: Dashboards description: Shared dashboards and their access grants. - name: Capability Sources description: >- Native provider capabilities (Google Workspace, Microsoft 365) and external MCP connections executed as the calling member. - name: Direct uploads description: Multipart uploads that stream workspace files straight to a provider. - name: Connectors description: >- Connector accounts and instances (GitHub and other sources) and their sync state. - name: GitHub description: >- GitHub App installation, repository discovery, and plugin import from GitHub. - name: Diagnostics description: Controlled egress diagnostics for self-hosted deployments. - name: Telemetry description: Telemetry event ingestion and adoption analytics. - name: Webhooks description: Signed inbound webhooks from third-party providers. - name: Admin description: Platform administration routes for allowlisted OpenWork administrators. - name: Deprecated description: Removed features that answer with 410 or an empty result for old clients. paths: /v1/capabilities/microsoft-365/calendar-events/{eventId}: patch: tags: - Capability Sources summary: Edit or reschedule an Outlook calendar event description: >- Requires Calendars.ReadWrite and calendarWrite. Updates only supplied subject, body, location, or paired UTC start/end. Requires confirmNotifications: true because updates may email attendees. Uses only the calling member's delegated Microsoft 365 connection. Never automatically retry a mutation after a timeout, cancellation, or ambiguous response; inspect current state first. operationId: updateMicrosoft365CalendarEvent parameters: - in: path name: eventId schema: type: string minLength: 1 maxLength: 512 required: true requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/Microsoft365CalendarEventUpdateBody' responses: '200': description: Microsoft Graph mutation receipt returned. content: application/json: schema: $ref: '#/components/schemas/Microsoft365CalendarEventResponse' '401': description: The caller must be signed in. content: application/json: schema: $ref: '#/components/schemas/UnauthorizedError' '409': description: The selected feature or delegated permission is missing. content: application/json: schema: $ref: '#/components/schemas/Microsoft365NeedsConnectionError' '413': description: Request body exceeds 1 MiB. content: application/json: schema: type: object properties: error: type: string const: invalid_request message: type: string required: - error - message '502': description: Microsoft Graph rejected the request or the outcome is unknown. content: application/json: schema: $ref: '#/components/schemas/Microsoft365GraphError' security: - bearerAuth: [] - denApiKey: [] components: schemas: Microsoft365CalendarEventUpdateBody: type: object properties: confirmNotifications: type: boolean const: true description: >- The user explicitly authorized this update and potential attendee email notifications from Microsoft Graph. subject: type: string minLength: 1 maxLength: 255 body: type: string maxLength: 20000 start: description: >- New UTC start, with Z suffix. Rescheduling requires both start and end. type: string maxLength: 40 format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$ end: description: New UTC end, with Z suffix. type: string maxLength: 40 format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$ location: type: string maxLength: 255 required: - confirmNotifications additionalProperties: false Microsoft365CalendarEventResponse: type: object properties: ok: type: boolean const: true event: $ref: '#/components/schemas/Microsoft365CalendarEvent' required: - ok - event UnauthorizedError: type: object properties: error: type: string const: unauthorized required: - error Microsoft365NeedsConnectionError: type: object properties: error: type: string const: needs_connection message: type: string required: - error - message Microsoft365GraphError: type: object properties: error: type: string const: microsoft_graph_error message: type: string outcome: type: string const: unknown retryable: type: boolean const: false required: - error - message Microsoft365CalendarEvent: type: object properties: id: type: string subject: type: string preview: type: string start: type: string startTimeZone: type: string end: type: string endTimeZone: type: string isAllDay: type: boolean location: type: string organizer: anyOf: - $ref: '#/components/schemas/Microsoft365EmailAddress' - type: 'null' attendees: type: array items: $ref: '#/components/schemas/Microsoft365EmailAddress' webLink: type: string onlineMeetingUrl: anyOf: - type: string - type: 'null' required: - id - subject - preview - start - startTimeZone - end - endTimeZone - isAllDay - location - organizer - attendees - webLink - onlineMeetingUrl Microsoft365EmailAddress: type: object properties: name: type: string address: type: string required: - name - address securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: session-token description: >- Session token passed as `Authorization: Bearer ` for user-authenticated Den routes. denApiKey: type: apiKey in: header name: x-api-key description: >- Organization API key passed as the `x-api-key` header. The raw key is the header value; do not prefix it with `Bearer`. ````