The Fastest Way to Integrate With the Office 365 Calendar API

The Nylas Calendar API abstracts away the complexity of syncing with Office 365 Calendars and makes it simple and fast to for your users to schedule events.

  • Node
  • Java
  • Python
  • Ruby
const Nylas = require('nylas');
    clientId: CLIENT_ID,
    clientSecret: CLIENT_SECRET,
const nylas = Nylas.with(ACCESS_TOKEN);{calendar_id:, limit: 10 }).then(events => {
    for (let event of events) {
            `Title: ${event.title}`


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:
    print("Title: {} | When: {} | Participants: {}".format(
        event.title, event.when, event.participants


require 'nylas'
nylas =
   client_id: CLIENT_ID,
   client_secret: CLIENT_SECRET,
   access_token: ACCESS_TOKEN
# Most user accounts have multiple calendars where events are stored
calendars = nylas.calendars
calendars.each{ |calendar|
        "Name: #{}   


Integrate Office 365 Calendars Maintenance-Free

The Nylas APIs handle every new feature roll-out and bug fix from the Office 365 APIs. Sync calendar events into your application in real-time and get bi-directional sync with full CRUD (create, read, update, delete).

Integrate With the Office 365 Calendar API in a Fraction of the Time

Integrating with Office 365 on your own would take around 664 hours. With Nylas, it takes just a few days. Calculate the costs of direct integration and discover your savings in time and money.

Free-Busy Endpoint

Streamline scheduling by querying free/busy information for a calendar during a certain time without compromising sensitive information about events, like the location.

Recurring Events

Support for creating, updating, and deleting recurring events so your users can schedule recurring meetings with ease.

Nylas Scheduler

Enable your users to create highly-customizable scheduling pages that allow attendees and organizers to quickly view availability and book meetings within your application.

Avoid the Costs of an Office 365 Calendar Integration

As your platform scales and your user base grows, so do costs for maintaining the Office 365 Calendar integration on your own. Nylas handles these for you, including costs for:

  • Operating and maintaining servers
  • Resolving breaking changes, like updates to authentication
  • Hundreds of hours spent reading documentation
  • Troubleshooting Office 365 specific bugs

The Nylas APIs abstracts away the ongoing maintenance tasks for you. Our API comes with out-of-the-box security certifications, and we power even more granular scopes than most providers to improve security for your end-users.

Calculate Your Savings With the Nylas APIs »

At Nylas, Securing Your Data is Paramount

Security is our top priority – we sweat the small stuff so you don’t have to. Nylas is SOC 2 Certified, Privacy Shield certified, GDPR compliant, and HIPAA and FINRA ready. Data from every calendar you sync is encrypted and isolated with multi-level permission checks.

Learn More
  • World-Class Security Certifications
  • Token Management
  • Whitelisted IPs
  • Data Encryption
  • Granular Authentication Scopes
  • Gated Permission Checks
Learn More


How do I know how much time and money I’m saving with the Nylas API?

You can calculate exactly how much time and money you can save with our savings calculator.

How do I get started integrating with the Office 365 Calendar API?

You can create a developer account with Nylas and sync up to 10 accounts for free here.

Where do I get the access key that allows me to begin integrating with the Office 365 Calendar API?

You can access the Nylas Calendar API for Office 365 directly from your Nylas dashboard. One key unlocks access to any calendar provider in the world! Exciting, we know.

How do my users activate calendar sync?

Your users can kick-start full calendar sync simply authenticating access. Your users will input their credentials and then be redirected back to your application.

What kinds of companies use the Nylas API to integrate with the Office 365 Calendar API?

Learn how customers in the CRM, ATS, automotive, finance and legal industries use the Nylas API on our case studies page.

What languages can I use to integrate with the Office 365 Calendar API?

We provide SDKs that make it easy to integrate your app using PythonJavaNode.js, or Ruby, or you can use a different language of choice to connect to our RESTful API.

How is the Nylas API integration with the Office 365 Calendar API secured?

The Nylas Calendar API encrypts 100% of your data with military-grade security standards. In addition, Nylas is GDPR compliant, SOC 2 compliant, and HIPAA and FINRA ready.

What are the pricing options for integrating with the Office 365 Calendar API?

You can sync up to 10 accounts for free. After that, pricing is based on the number of accounts you have synced; you can view our pricing page for more details.

Additional questions about building your calendar integration?

Check out our comprehensive Getting Started Guide.

Can I integrate Office 365 contacts as well?

Once your account authenticates with Nylas and our sync server detects the account, we will automatically start syncing mail, calendar, and contact data if you passed in the email and contact scopes when authenticating.