Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
Your users might need to schedule meetings with people outside your organization. To simplify the process of finding mutually agreeable meeting times, Microsoft 365 enables you to make calendars available to people outside your organization. These people need to see free and busy times for users in your organization, but don't have user accounts for your Microsoft 365 organization.
As the admin, you can enable external calendar sharing for all users in your organization. Once sharing is enabled, users can use Outlook on the web to share their calendars with anyone inside or outside the organization. People inside the organization can view the shared calendar along with their own calendar. People outside the organization are sent a URL that they can use to view the calendar. Users decide when to share, how much to share, and when to keep their calendars private.
Note
If you want to share calendar information with an on-premises Exchange organization, the Exchange administrator must configure an authentication relationship (federation) between the on-premises environment and Exchange Online. Federation requires supported Exchange versions and specific configuration. For more information, see Sharing.
Enable calendar sharing in the Microsoft 365 admin center
Sign in to the Microsoft 365 admin center.
From the left navigation bar, select … Show all, and then select Settings to expand it.
Under Settings, select Org Settings.
On the Services tab of the Org Settings page, select Calendar.
In the Calendar pane:
To allow your users to share their calendars with external Microsoft 365 or Exchange users, select Let your users share their calendars with people outside of your organization who have Office 365 or Exchange.
To allow sharing with people who don't sign in, select Allow anyone to access calendars with an email invitation. This option only becomes available after you enable sharing with external Microsoft 365 or Exchange users.
If you allow anonymous users outside of your organization access to your users' calendars, choose what type of calendar information to make available to your users:
- Show calendar free/busy information with time only.
- Show calendar free/busy information with time, subject, and location.
- Show all calendar appointment information.
How users share their calendars
After you enable external calendar sharing, users can choose whether to share their own calendars with external people. Users control who they share with, what level of detail they share, and when to stop sharing.
For step-by-step instructions, see Share your calendar in Outlook on the web.