Two Factor Authentication Outlook 365 In Mac App

  1. Two Factor Authentication Outlook 365 In Mac Apps

Based on your understanding of multi-factor authentication (MFA) and its support in Microsoft 365, it’s time to set it up and roll it out to your organization.


If you purchased your subscription or trial after October 21, 2019, and you're prompted for MFA when you sign in, security defaults have been automatically enabled for your subscription.

Gmail, Yahoo, iCloud,, and AOL accounts all use two-factor authentication to help verify that you’re the person trying to access your email account. To add your email account to Outlook, you’ll need an app password, also known as an application password. This is a different password than your regular email account password.

Before you begin

  • You must be a Global admin to manage MFA. For more information, see About admin roles.
  • If you have legacy per person MFA turned on, Turn off legacy per person MFA.
  • If you have Office 2013 clients on Windows devices, turn on Modern Authentication for Office 2013 clients.
  • Advanced: If you have third-party directory services with Active Directory Federation Services (AD FS), set up the Azure MFA Server. See advanced scenarios withAzure Multi-Factor Authentication and third-party VPN solutions for more information.

Turn Security defaults on or off

For most organizations, Security defaults offer a good level of additional sign-in security. For more information, see What are security defaults?

If your subscription is new, Security defaults might already be turned on for you automatically.

You enable or disable security defaults from the Properties pane for Azure Active Directory (Azure AD) in the Azure portal.

  1. Sign in to the Microsoft 365 admin center with global admin credentials.
  2. In the left nav choose Show All and under Admin centers, choose Azure Active Directory.
  3. In the Azure Active Directory admin center choose Azure Active Directory > Properties.
  4. At the bottom of the page, choose Manage Security defaults.
  5. Choose Yes to enable security defaults or No to disable security defaults, and then choose Save.

If you have been using baseline Conditional Access policies, you will be prompted to turn them off before you move to using security defaults.

  1. Go to the Conditional Access - Policies page.
  2. Choose each baseline policy that is On and set Enable policy to Off.
  3. Go to the Azure Active Directory - Properties page.
  4. At the bottom of the page, choose Manage Security defaults.
  5. Choose Yes to enable security defaults and No to disable security defaults, and then choose Save.

Use Conditional Access policies

If your organization has more granular sign-in security needs, Conditional Access policies can offer you more control. Conditional Access lets you create and define policies that react to sign in events and request additional actions before a user is granted access to an application or service.


Turn off both per person MFA and Security defaults before you enable Conditional Access policies.

Conditional Access is available for customers who have purchased Azure AD Premium P1, or licenses that include this, such as Microsoft 365 Business Premium, and Microsoft 365 E3. For more information, see create a Conditional Access policy.

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Risk-based conditional access is available through Azure AD Premium P2 license, or licences that include this, such as Microsoft 365 E5. For more information, see risk-based Conditional Access.


For more information about the Azure AD P1 and P2, see Azure Active Directory pricing.

Turn on Modern authentication for your organization

For most subscriptions modern authentication is automatically turned on, but if you purchased your subscription a long time ago, it might not be. This has to be turned on before MFA works appropriately with Office apps.

  1. In the Microsoft 365 admin center, in the left nav choose Settings > Org settings.
  2. Under Services tab, choose Modern authentication, and in the Modern authentication pane, make sure Enable Modern authentication is selected. Choose Save changes.

Turn off legacy per person MFA

If you have previously turned on per person MFA, you must turn it off before enabling Security defaults.

  1. In the Microsoft 365 admin center, in the left nav choose Users > Active users.
  2. On the Active users page, choose Multi-factor authentication.
  3. On the multi-factor authentication page, select each user and set their Multi-Factor auth status to Disabled.

Two Factor Authentication Outlook 365 In Mac Apps

Next steps

Max OS Sierra: 10.12.6 (16G29)

ThunderBird 52.2.1 (64-bit)


I recently enabled MFA / 2FA on my corporate office365 account and I have had trouble with ThunderBird connecting since. I get an error message that states 'Server <e-mail address> has disconnected. The server may have gone offline'

The error really doesn't make much sense because it's not identifying the Office 365 server as the configuration states, rather it is referring to my e-mail address. I haven't changed my ThunderBird Configuration at all. With MFA in office 365 users have the ability to make single passwords for their non-Microsoft Apps, which I have done. The ThunderBird client accepts that password, and will even occasionally send my mail, however, I still receive this connectivity error.

Adding some words for google's sake:

two factor authentication

multi factor authentication