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Developers Guide

Microsoft will be deprecating Basic Authentication support for all Exchange Online accounts as of October 1, 2022.

Check out our Microsoft Exchange Online and Basic Authentication Changes article for more information.

To make sure your organization makes the most out of Nylas, there are a few things to keep in mind.

Choose an Authentication Method

Users will need to authenticate against your application. To do this, you can choose to either have Nylas handle your users' logins or build your own login portal.

Once you've decided on an authentication method, you can choose how to collect the user's information. Microsoft offers two authentication methods:

We recommend reading about both options to determine which method will work best for you.

Office 365


  • If your application requires contacts, you need to use EAS. Make sure the contacts scope for both Nylas and Azure is enabled.

Basic Authentication

Below are some things to keep in mind if you're using Basic Authentication:

  • An Azure application isn't needed.
  • This method uses the username and password to authenticate.
  • If you have 2FA enabled, you need to provide the app password instead of the email password.
  • If you're trying to enable one of the following personal accounts, you will have to use Basic Authentication:
    • Office 365
    • Outlook
    • Live
    • Hotmail
  • If the account is sourced from Active Directory, you can use Modern Authentication. Check with your system administrator to confirm the account type.

Service Accounts

Below are some things to keep in mind when using service accounts:

What's Next?