Outlook.com now supports adding Google Calendars, allowing users with work or school accounts to access their calendars in one place. This change is only available on the web version of Outlook and requires setting up the integration by clicking the "Add Calendar" button in the sidebar and selecting Google as the calendar option. Users can then choose whether to allow Google events to affect their availability, but others with access will not be able to see those events. Additionally, users can set up integrations using Zapier to automatically add or update events from Google Calendar to Outlook calendars, providing a seamless two-way sync experience.