MFA can be enabled while you still have basic auth, but if it is enabled, you have to use app passwords for programs that are not using modern auth (Skype and Outlook). The rest of MS Office (Word/Excel etc.) is already using modern auth. If Mailbird doesn't support OAuth 2.0 for your account (like for a personal Outlook account) and you have MFA (Multi-factor authentication) enabled, you will need to use an App password generated by your email server.Enabling modern authentication basically will affect only Outlook and Skype. Note that for IMAP or POP3 to work properly you will need also to have SMTP Auth enabled in your Microsoft 365 organization settings (it is now disabled by default for new organizations).

By default, Mailbird will try to use Exchange protocol, but you can also use IMAP or POP3 protocol by choosing 'Edit server settings' and changing 'Server type'.

You should be redirected to your login page where you can authenticate Mailbird via OAuth 2.0

In the settings window, choose 'Microsoft OAuth 2.0' as authentication and save settings.

After adding the account, do not accept the default setting but click 'Edit server settings'.

Then in order to use OAuth 2.0, you will need to manually change settings by following those two simple steps: * If you have a Microsoft 365 account that is using a custom identity provider (like in case of using some email filtering or security gateway solution on top), then Mailbird won't automatically detect settings and will try to use a password instead.

OAuth 2.0 is NOT supported for on-premise Exchange servers accounts.

OAuth 2.0 is supported for Microsoft 365 accounts, but NOT for personal Outlook accounts (e.g.

If your account is Microsoft 365 we will automatically try to use OAuth 2.0 authentication so you don't need to check anything.After you log in, you can return to Mailbird and your account should be ready to use.

Click 'Continue' in the next step and you will be redirected to the Microsoft login page. In Menu -> Settings -> Accounts click 'Add' and input your details:Ģ. If you have a Microsoft 365 account (also known as Office 365), you can add it using OAuth 2.0 (modern authentication) in Mailbird.ġ.

Modern auth office 365