> ## Documentation Index > Fetch the complete documentation index at: https://developer.instantly.ai/llms.txt > Use this file to discover all available pages before exploring further. # Initialize microsoft oauth > Creates an OAuth session and returns the Microsoft authorization URL. The user should be redirected to auth_url to complete the OAuth flow. Poll the status endpoint to check for completion. **Special rate limits (stricter than the standard API rate limit) to comply with upstream Microsoft rate limits:** - 75 requests per minute per workspace - 150 requests per minute per IP If Microsoft's upstream OAuth service is temporarily unavailable, requests may return 503. ## OpenAPI ````yaml https://api.instantly.ai/openapi/api_v2.json post /api/v2/oauth/microsoft/init openapi: 3.1.0 info: title: API Explorer description: >- The entire API V2 documentation is interactive and can be tested here. To the right side of every endpoint you will see a box with an example request. You can click on the "Try it" button to send a request to the server right from the docs. You will need to provide an API key by clicking the `ApiKeyAuth_token` blue text. version: 2.0.0 servers: - url: https://api.instantly.ai description: Instantly API Server security: - ApiKeyAuth: [] tags: - name: Analytics description: Endpoints related to analytics x-displayName: Analytics - name: OAuth description: >- OAuth authentication endpoints for connecting Google and Microsoft email accounts x-displayName: OAuth - name: Account description: An email account that can be used to send campaigns x-displayName: Account - name: Campaign description: A campaign that can be sent to a list of recipients x-displayName: Campaign - name: Email description: >- A campaign email, a reply, a manually sent email, or any other email that's visible in the Unibox x-displayName: Email - name: EmailVerification description: A single email verification x-displayName: Email Verification - name: LeadList description: A list used to store leads x-displayName: Lead List - name: InboxPlacementTest description: An inbox placement test x-displayName: Inbox Placement Test - name: InboxPlacementAnalytics description: Analytics data for individual emails in inbox placement tests x-displayName: Inbox Placement Analytics - name: InboxPlacementBlacklist&SpamAssassinReport description: Report data for an inbox placement test x-displayName: Inbox Placement Blacklist & SpamAssassin Report - name: APIKey description: API Key x-displayName: API Key - name: AccountCampaignMapping description: Account Campaign Mapping x-displayName: Account Campaign Mapping - name: Lead description: A lead entity representing an individual lead x-displayName: Lead - name: BackgroundJob description: A background job that can be used to perform long-running tasks x-displayName: Background Job - name: CustomTag description: >- A custom tag for organizing and categorizing accounts and campaigns. You can use them as filters in apis that list accounts and campaigns. x-displayName: Custom Tag - name: CustomTagMapping description: >- This entity represents a tag being assigned to a specific campaign or email account. When an email account is assigned a tag, a new custom tag mapping entry is created, which connects the tag (`tag_id` field) with the email account (`resource_id` field). You can use it to see which tag si connected to which resource. x-displayName: Custom Tag Mapping - name: BlockListEntry description: A blocked email or domain x-displayName: Block List Entry - name: LeadLabel description: A custom label for categorizing and managing leads x-displayName: Lead Label - name: Workspace description: A workspace entity representing a workspace x-displayName: Workspace - name: SuperSearchEnrichment description: >- An enrichment can take different forms, such as email enrichment or LinkedIn enrichment. Leads may be imported from SuperSearch using the dedicated endpoint, or enriched directly within a list or campaign by attaching an enrichment to it. x-displayName: SuperSearch Enrichment - name: WorkspaceGroupMember description: >- A member of a workspace group. You can use the endpoints within this entity to manage the members of a workspace group. x-displayName: Workspace Group Member - name: WorkspaceMember description: A member of a workspace with associated user details x-displayName: Workspace Member - name: CampaignSubsequence description: A subsequence entity representing a follow-up sequence x-displayName: Campaign Subsequence - name: AuditLog description: Audit log records for tracking system activities x-displayName: Audit Log - name: Webhook description: A webhook subscription for receiving event notifications x-displayName: Webhook - name: WebhookEvent description: A webhook event that was sent or attempted to be sent x-displayName: Webhook Event - name: DFYEmailAccountOrder description: A Done-For-You email account order x-displayName: DFY Email Account Order - name: CustomPromptTemplate description: Custom prompt templates for creating custom prompts x-displayName: Custom Prompt Template - name: SalesFlow description: >- Manages how sales users view and interact with campaign and lead lists within the sales flow. x-displayName: Sales Flow - name: EmailTemplate description: A campaign email template x-displayName: Email Template - name: WorkspaceBilling description: Workspace Billing x-displayName: Workspace Billing - name: CRMActions description: CRM related actions x-displayName: CRM Actions paths: /api/v2/oauth/microsoft/init: post: tags: - OAuth summary: Initialize microsoft oauth description: >- Creates an OAuth session and returns the Microsoft authorization URL. The user should be redirected to auth_url to complete the OAuth flow. Poll the status endpoint to check for completion. **Special rate limits (stricter than the standard API rate limit) to comply with upstream Microsoft rate limits:** - 75 requests per minute per workspace - 150 requests per minute per IP If Microsoft's upstream OAuth service is temporarily unavailable, requests may return 503. operationId: initMicrosoftOAuth responses: '200': description: Default Response content: application/json: schema: type: object properties: session_id: type: string description: Session ID for polling status example: abc123def456 auth_url: type: string description: Microsoft authorization URL to redirect user to example: >- https://login.microsoftonline.com/common/oauth2/v2.0/authorize?... expires_at: type: string format: date-time description: Session expiry time (10 minutes from creation) example: '2026-01-14T12:30:00.000Z' '429': description: >- Rate limit exceeded — 75 requests per minute per workspace or 150 requests per minute per IP content: application/json: schema: type: object description: >- Rate limit exceeded — 75 requests per minute per workspace or 150 requests per minute per IP properties: statusCode: type: number enum: - 429 example: 429 error: type: string enum: - Too Many Requests example: Too Many Requests message: type: string example: Rate limit exceeded for OAuth session creation required: - statusCode - error - message '503': description: >- Upstream provider temporarily unavailable — the provider is rate-limiting Instantly. Retry after a short delay. content: application/json: schema: type: object description: >- Upstream provider temporarily unavailable — the provider is rate-limiting Instantly. Retry after a short delay. properties: statusCode: type: number enum: - 503 example: 503 error: type: string enum: - Service Unavailable example: Service Unavailable message: type: string example: OAuth is temporarily unavailable, please retry shortly required: - statusCode - error - message components: securitySchemes: ApiKeyAuth: type: http scheme: bearer ````