No ActiveSync for Mac OS and Windows
Once you have enabled two-factor authentication, external applications such as Outlook, Thunderbird, DAVx⁵, or mobile calendar and contact apps can no longer access mailbox using your regular password.
To do so, you need to create an application password. Without enabled two-factor authentication (2FA), the use of application passwords is optional.
Data synchronization with ActiveSync only works with mobile devices such as the iPhone or iPad, Android devices, and BlackBerry. It is not officially possible to use ActiveSync to synchronize data with Windows PCs or Mac computers. ActiveSync was not developed for this purpose.
It is possible that some users have managed do this, but the function is not officially supported and we do not recommend this practice.
If you wish to synchronize your data with a Mac or Windows PC, use CalDAV and CardDAV. We describe the process of setting up the different platforms in our Help/FAQ.
