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Sharing in Exchange Online

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You may need to coordinate schedules with people in different organizations or with friends and family members so that you can work together on projects or plan social events. With Microsoft 365 and Office 365, administrators can set up different levels of calendar access in Exchange Online to allow businesses to collaborate with other businesses and to let users share their schedules with others. Business-to-business calendar sharing is set up by creating organization relationships. User-to-user calendar sharing is set up by applying sharing policies.

Note

Organization Sharing functionality of the Classic Exchange admin center experience is available in the new Exchange admin center as we continue to work on updated versions. If you're using Edge incognito and this page isn't working, enable the third-party cookies.

Sharing Scenarios in Exchange Online

The following sharing scenarios are supported in Exchange Online:

Sharing goal Setting to use Requirements
Share calendars with another Microsoft 365 or Office 365 organization Organization relationships None, ready to configure
Share calendars with an on-premises Exchange organization Organization relationships The on-premises Exchange administrator has to set up an authentication relationship with the cloud (also known as "federation") and must meet minimum software requirements
Share a Microsoft 365 or Office 365 user's calendar with another internet user Sharing policies None, ready to configure
Share a Microsoft 365 or Office 365 user's calendar with an Exchange on-premises user Sharing policies The on-premises Exchange administrator has to set up an authentication relationship with the cloud (also known as "federation") and must meet minimum software requirements

Sharing documentation

The following table contains links to articles that will help you learn about and manage sharing in Exchange Online.

Topic Description
Organization relationships in Exchange Online Learn more about the one-to-one relationships between organizations that enable calendar free/busy sharing.
Sharing policies in Exchange Online Learn more about the person-to-person policies that enable calendar sharing.