Integrate Microsoft Exchange Calendar API into Your App

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.

  • Direct compatibility with the Microsoft Exchange Calendar, a unified API to facilitate seamless bi-directional calendar integration. 
  • Access to necessary calendar functionalities, such as event creation, updates, notifications, scheduled send, and reminders, across providers via a single API. 
  • Enhanced security and compliance features, ensuring data protection and privacy in line with Microsoft Exchange Calendar standards.
For developers

Schedule meetings in minutes

With a few lines of code, build calendar CRUD capabilities and bi-directional sync.

See the docs

Node.js

Ruby

Python

Java

Curl

const events = await nylas.events.list({
  identifier: 1,
  queryParams: {
    calendarId: 2
  }
})
require 'nylas'

nylas = Nylas::Client.new(api_key: 'API_KEY')
query_params = { limit: 5 }
messages, _ = nylas.messages.list(identifier: '<GRANT_ID>', query_params: query_params)

messages.each {|message|
    puts "[#{Time.at(message[:date]).strftime("%d/%m/%Y at %H:%M:%S")}] \
           #{message[:subject]}"
} 
events = nylas.events.list(
  grant_id,
  query_params={
    "calendar_id": 1
  }
)
import com.nylas.NylasClient;
import com.nylas.models.*;
import java.text.SimpleDateFormat;

public class ReadInbox {
    public static void main(String[] args) throws NylasSdkTimeoutError, NylasApiError {
        NylasClient nylas = new NylasClient.Builder("<API_KEY>").build();
        ListMessagesQueryParams queryParams = new 
        ListMessagesQueryParams.Builder().limit(5).build();
        ListResponse<Message> message = nylas.messages().list("<GRANT_ID>", queryParams);

        for(Message email : message.getData()) {
            String date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").
                format(new java.util.Date((email.getDate() * 1000L)));

            System.out.println("[" + date + "] | " + email.getSubject());
        }
    }
} 
--url https://api.us.nylas.com/v3/grants/<GRANT_ID>/events
--header 'Accept: application/json' \
--header 'Authorization: Bearer <API_KEY_OR_ACCESS_TOKEN>' \
--header 'Content-Type: application/json'

Node.js

Ruby

Python

Java

Curl

const draft = new Draft.default(nylas, {
  subject: "With Love, from Nylas",
  body: "This email was sent using the Nylas email API.",
  to: [{ name: "Nyla", email: "nyla@nylas.com" }],
});
const message = await draft.send();
require 'nylas'

nylas = Nylas::Client.new(api_key: "<API_KEY>")

# Call a list of calendars
calendars, _request_ids = nylas.calendars.list(identifier: "<GRANT_ID>", query_params: {limit: 5})

calendars.each {|calendar|
    puts calendar
}  
draft = nylas.drafts.create()
draft.subject = 'With Love, from Nylas'
draft.body = 'This email was sent using the Nylas email API.'
draft.to = [{'name': 'Nyla', 'email': 'nyla@nylas.com')}]
message = draft.send()
import com.nylas.NylasClient;
import com.nylas.models.*;
import java.util.List;

public class read_calendars {
    public static void main(String[] args) throws NylasSdkTimeoutError, NylasApiError {
        NylasClient nylas = new NylasClient.Builder("<API_KEY>").build();
        ListCalendersQueryParams listCalendersQueryParams = new  
        ListCalendersQueryParams.Builder().limit(5).build();
        List<Calendar> calendars = nylas.calendars().list(dotenv.get("CALENDAR_ID"), 
        listCalendersQueryParams).getData();

        for (Calendar calendar : calendars) {
            System.out.println(calendar);
        }
    }
}
curl --request POST \
  --url https://api.nylas.com/send \
  --data '{
  "subject": "From Nylas",
  "to": [
    {
      "email": "nyla@nylas.com",
      "name": "Nyla"
    }
  ],
  "from": [
    {
      "name": "Developer Relations",
      "email": "devrel@nylas.com"
    }
  ],
  "body": "This email was sent using the Nylas email API.",
}'

Node.js

Ruby

Python

Java

Curl

const contact = new Contact(nylas);

contact.givenName = 'Nyla'
contact.birthday = '2014-06-01'
contact.companyName = 'Nylas'
contact.jobTitle = 'Communications Platform'
contact.officeLocation = 'San Francisco'
contact.notes = 'Check out the Nylas Email, Calendar, and Contacts APIs'
contact.emailAddresses = [new EmailAddress({
  type: 'work', email: 'nyla@nylas.com'
})];
contact.save();
require 'nylas'	

nylas = Nylas::Client.new(
	api_key: “<API_KEY”
)

query_params = {
    limit: 5
}

contacts, _ = nylas.contacts.list(identifier: ENV["GRANT_ID"], query_params: query_params)
contacts.each {|contact|
    puts "Name: #{contact[:given_name]} #{contact[:surname]} | " \
    "Email: #{contact[:emails][0][:email]} | ID: #{contact[:id]}"
}
contact = nylas.contacts.create()
contact.given_name = 'Nyla'
contact.office_location = 'San Francisco'
contact.company_name = 'Nylas'
contact.notes = 'Check out the Nylas Email, Calendar, and Contacts APIs'
contact.manager_name = 'Communications'
contact.job_title = 'Communications Platform'
contact.birthday = datetime(2014, 6, 1)
contact.emails['work'] = ['nyla@nylas.com']
contact.save()
import com.nylas.NylasClient;
import com.nylas.models.*;

public class ReadAllContacts {
   public static void main(String[] args) throws
           NylasSdkTimeoutError, NylasApiError {
       NylasClient nylas = new NylasClient.Builder("<API_KEY>").build();

       ListContactsQueryParams queryParams =
               new ListContactsQueryParams.Builder().
                       limit(5).build();

       ListResponse<Contact> contacts = nylas.contacts().list(dotenv.get("GRANT_ID"),
       queryParams);

       for(Contact contact : contacts.getData()){
           assert contact.getEmails() != null;
           System.out.printf("Name: %s | Email: %s | Id: %s%n",
                   contact.getGivenName(),
                   contact.getEmails().get(0).getEmail(),
                   contact.getId()
                   );
       }
   }
}
curl --request POST \
  --url https://api.nylas.com/contacts \
  --data '{
  "birthday": "2014-06-01",
  "company_name": "Nylas",
  "emails": [
    {
      "email": "nyla@nylas.com",
      "type": "work"
    }
  ],
  "given_name": "Nyla",
  ],
  "job_title": "Nylas Mascot",
  "phone_numbers": [
    {
      "number": "1 800 GO NYLAS",
      "type": "business"
    }
  ],
  "web_pages": [
    {
      "type": "work",
      "url": "nylas.com"
    }
  ],
}'

Response

{
    "request_id": "cbd60372-df33-41d3-b203-169ad5e3AAAA",
    "data": [
        {
            "busy": true,
            "calendar_id": "primary",
            "conferencing": {
                "details": {
                    "meeting_code": "ist-****-tcz",
                    "url": "https://meet.google.com/ist-****-tcz"
                },
                "provider": "Google Meet"
            },
            "created_at": 1701974804,
            "creator": {
                "email": "anna.molly@example.com",
                "name": ""
            },
            "description": null,
            "grant_id": "1e3288f6-124e-405d-a13a-635a2ee54eb2",
            "hide_participants": false,
            "html_link": "https://www.google.com/calendar/event?eid=NmE0dXIwabQAAAA",
            "ical_uid": "6aaaaaaame8kpgcid6hvd0q@google.com",
            "id": "6aaaaaaame8kpgcid6hvd",
            "object": "event",
            "organizer": {
                "email": "anna.molly@example.com",
                "name": ""
            },
            "participants": [
                {
                    "email": "jenna.doe@example.com",
                    "status": "yes"
                },
                {
                    "email": "anna.molly@example.com",
                    "status": "yes"
                }
            ],
            "read_only": true,
            "reminders": {
                "overrides": null,
                "use_default": true
            },
            "status": "confirmed",
            "title": "Holiday check in",
            "updated_at": 1701974915,
            "when": {
                "end_time": 1701978300,
                "end_timezone": "America/Los_Angeles",
                "object": "timespan",
                "start_time": 1701977400,
                "start_timezone": "America/Los_Angeles"
            }
        }
    ]
}
{
    "type": "event.created2",
    "data": {
      "object": {
        "busy": true,
        "calendar_id": "mock-name%40nylas.com",
        "created_at": 1234567890,
        "description": "mock description",
        "hide_participants": false,
        "ical_uid": "mock_uids@google.com",
        "id": "mock-data-id",
        "object": "event",
        "owner": "Mock Owner <mock_owner@example.com>",
        "organizer": {
          "name": "mock organizer name",
          "email": "mock_email@example.com"
        },
        "participants": [
          {
            "email": "mockParticipantsA@example.com",
            "name": "mockParticipantsA",
            "status": "yes"
          },
          {
            "email": "mockParticipantsB@example.comm",
            "name": "mockParticipantsB",
            "status": "noreply"
          }
        ],
        "read_only": false,
        "reminders": null,
        "status": "confirmed",
        "title": "mock_title",
        "updated_at": 1234567890,
        "when": {
          "start_time": 1234567890,
          "start_timezone": "America/Edmonton",
          "end_time": 1234567890,
          "end_timezone": "America/Edmonton",
          "object": "timespan"
        }
      }
    }
  }  
 
{
    "type": "event.created3",
    "data": {
      "object": {
        "busy": true,
        "calendar_id": "mock-name%40nylas.com",
        "created_at": 1234567890,
        "description": "mock description",
        "hide_participants": false,
        "ical_uid": "mock_uids@google.com",
        "id": "mock-data-id",
        "object": "event",
        "owner": "Mock Owner <mock_owner@example.com>",
        "organizer": {
          "name": "mock organizer name",
          "email": "mock_email@example.com"
        },
        "participants": [
          {
            "email": "mockParticipantsA@example.com",
            "name": "mockParticipantsA",
            "status": "yes"
          },
          {
            "email": "mockParticipantsB@example.comm",
            "name": "mockParticipantsB",
            "status": "noreply"
          }
        ],
        "read_only": false,
        "reminders": null,
        "status": "confirmed",
        "title": "mock_title",
        "updated_at": 1234567890,
        "when": {
          "start_time": 1234567890,
          "start_timezone": "America/Edmonton",
          "end_time": 1234567890,
          "end_timezone": "America/Edmonton",
          "object": "timespan"
        }
      }
    }
  }  
 

Webhooks

Receive real-time notifications to monitor events and trigger automated workflows.

Sandbox

Experiment with our API with pre-configured settings in the Nylas Dashboard.

SDKs

Fast-track your integration with our Node.js, Ruby, Python, Java and Kotlin SDKs.

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.

Ready to start building?

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