Calendar API for Microsoft Exchange Calendar integration

The Nylas Calendar API allows developers to quickly and easily sync your application bi-directionally with Microsoft Exchange calendars.

Calendar Integration
Background Image
import Nylas from 'nylas';
    clientId: CLIENT_ID,
    clientSecret: CLIENT_SECRET,
var nylas =  
    .then(count => {
            `You have ${count} events.`
public class Calendar { 
  public static void main (String[] args) throws Exception {
    NylasAccount account = new NylasClient().account(ACCESS_TOKEN);
    List events =
      new EventQuery().title("Birthday Party!")); Event event ) -> {
      System.out.println( event.getLocation() ); 
from nylas import APIClient
nylas = APIClient(
events =
for event in events:
require 'nylas'
nylas =
    app_id: CLIENT_ID,
    app_secret: CLIENT_SECRET,
    access_token: ACCESS_TOKEN
events =
events.each do |events|
    puts events.title

Streamline Microsoft Exchange Calendar API integration effortlessly with Nylas

We built the Nylas Calendar API to provide a simpler way to integrate with all major calendar providers: Microsoft Exchange Calendar, Google Calendar, Yahoo!, and more.the rest.

Nylas eliminates the headache of needing to manage .ics files and iCal so your team can focus on building the features they love.

Avoid the complexity of Microsoft Exchange protocols

Build fully functional, bi-directionally syncing connections between your app and Microsoft Exchange Calendar with just a few lines of code.

Bypass integration complications

Circumvent working with proprietary protocols. Nylas handles the complexities of EWS, EAS, and binary XML for you.

Bi-directional sync & full CRUD

Sync data bi-directionally between Microsoft Exchange Calendar and your app, and give users full CRUD (create, read, update, and delete) access natively within your application.

Connect with just four lines of code

Integrate Microsoft Exchange Calendar data with ease. The Nylas Calendar API simplifies Microsoft Exchange’s SOAP API documentation into a simple, parsed packet that plugs right into your app.

Build for free

Unlock your potential with Nylas and start building for free today. Experience the power of our robust APIs to streamline your development process and maintenance with integrations across providers.

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Let our experts help you build a best-in-class Microsoft Exchange Calendar integration

Contact us today for more information, including live demos, implementation options, and pricing details.

Our experts will help you understand:

  • How to integrate with Microsoft Exchange Calendar
  • What you need to know about the Microsoft authentication and verification process
  • How Nylas helps mitigate the complexity of building your email integration

Embed scheduling instantly from any calendar
Reduce costs and increase efficiency

Building calendar sync alone for Microsoft Exchange in-house would take about 120 hours developer hours and more than $9,500, with support overhead increasing over time. Additional cost considerations include: 

  • Authentication
  • Security 
  • Building admin UI and logging to troubleshoot
  • Operating servers at scale
  • Time spent specializing in EWS, EAS, or Graph
  • Onboarding and training teams to manage the integration
  • Support costs
  • Debugging server-specific issues

With Nylas, get pre-built solutions with more secure, reliable connections that scale, saving you money and integrating with Microsoft Exchange Calendar much quicker.

Calculate your savings with the Nylas APIs
Secure Integration with the Microsoft Exchange Calendar API

Nylas protects your data every step of the way,  Adhering toSOC 2 Type II, GDPR, HIPAA, HITECH, ISO 27001, and CCPA. Data from every calendar you sync is encrypted and isolated with multi-level permission checks.

  • World-class security measures implemented for your peace of mind
  • Robust token management system ensures authorized access
  • Only trusted IPs are whitelisted for added security
  • Data encryption at all times — in transit and at rest
  • Granular authentication scopes for precise control over permissions
  • Gated permission checks to ensure authorized actions
Download the Security Whitepaper
Frequently Asked Questions

What is Outlook Calendar API Integration?

Outlook Calendar API integration involves connecting the functionalities of Outlook Calendar 

with another app or service using the Outlook Calendar API. The Outlook Calendar API allows developers to access and interact with calendar data, creating, updating, and retrieving events, tasks, and other calendar-related information. 

By integrating with the Outlook Calendar API, developers can enable their apps to sync and interact with Outlook Calendar, providing users with seamless access to their events, appointments, and tasks from within the integrated platform. This integration allows users to leverage the features and capabilities of Outlook Calendar while using their preferred app or service.

How do I get started integrating with the Outlook Calendar API?

To start integrating with the Outlook Calendar API, you must first authenticate your application with Outlook to obtain the required credentials. Microsoft has API documentation you can follow, which outlines the endpoints, request formats, and response structures. Then, utilize the documentation and relevant SDKs to build your integration and access the desired calendar functionalities.

How do I integrate Outlook Calendar API with my app?

To integrate the Outlook Calendar API with your app, follow this step-by-step guide, covering all the necessary aspects to sync Google and Outlook calendars, allowing you to combine calendars from different providers. Get instructions on setting up a Nylas application, utilizing Vercel for frontend and backend development, configuring Google and Azure apps, testing app integrations through the Nylas Dashboard, implementing a hosted authentication flow, handling the Nylas callback in the backend, syncing calendar events, and displaying the synchronized calendars on the frontend.

Is there a cost associated with using Outlook Calendar integration?

The cost of using Outlook Calendar integration depends on your subscription plan. If you’re using Microsoft 365, calendar integration is typically included as part of the subscription. However, if you’re using a standalone Outlook account, there may be limitations or additional costs associated with API access. Check Microsoft’s pricing documentation or consult their sales team for accurate and up-to-date information.

Adding calendar functionality to your app includes additional costs beyond initial setup and configuration. You also need to consider ongoing maintenance and support, necessary updates or upgrades, security, infrastructure, and fees charged by the providers. See here for a detailed breakdown of integration steps, time savings per provider, and how Nylas can save you money and help you integrate faster.

What programming languages can I use to integrate the Outlook Calendar API?

Several programming language options exist to integrate the Outlook Calendar API with your app. JavaScript/Node.js, Python, C#, Java, and Ruby are popular choices. These languages allow you to make HTTP requests and interact with the Outlook Calendar API. You can also consider using Nylas, which provides an API abstraction layer for integrating with various calendar services, including Outlook Calendar. Nylas simplifies the integration process by offering a unified interface that you can use with different programming languages.

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