Remove an organization relationship in Exchange Online
An organization relationship lets users in your Office 365 organization share calendar free/busy information with other Office 365 or on-premises Exchange organizations. You can remove an organization relationship to disable calendar sharing with the other organization.
To learn more about organization relationships, see Organization relationships in Exchange Online.
What do you need to know before you begin?
Estimated time to complete: 5 minutes.
You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the Permissions in Exchange Online topic.
Use the Exchange admin center to remove an organization relationship
From the Microsoft 365 admin center go to Admin > Exchange.
Go to organization > sharing.
Under Organization Sharing, select an organization relationship, and then click Delete .
In the warning that appears, click yes.
Use Exchange Online PowerShell to remove an organization relationship
This example removes the organization relationship Contoso.
Remove-OrganizationRelationship -Identity "Contoso"
For detailed syntax and parameter information, see Remove-OrganizationRelationship.
How do you know this worked?
To verify that you have successfully removed the organization relationship, do one of the following:
In the Exchange admin center, go to organization > sharing and verify that the organization relationship isn't displayed in the list view under Organization Sharing.
Run the following command to verify the organization relationship information is removed.
Get-OrganizationRelationship | Format-List