Setup Calendar Sharing between Office 365 tenants

Legall, Dominique 5 Reputation points
2024-11-12T21:09:02.7966667+00:00

With our hybrid tenant we want to share calendar free/busy information with another Office 365 tenant that is fully online. Both tenants created a New OrganizationRelationship with the following command:

New-OrganizationRelationship -Name "respectiveName" -DomainNames "respectiveName.com" -FreeBusyAccessEnabled $true -FreeBusyAccessLevel AvailabilityOnly -TargetApplicationUri "outlook.com" -TargetAutodiscoverEpr "https://autodiscover-s.outlook.com/autodiscover/autodiscover.svc/WSSecurity"

However, only the Exchange Online Only Tenant can view the calendar from the hybrid tenant. The hybrid tenant cannot view the other tenants calendar free/busy information. We followed instructions on: https://learn.microsoft.com/en-us/exchange/sharing/organization-relationships/create-an-organization-relationship

What is the issue?

Looking forward to your feedback - many thanks!

Microsoft Exchange Online
Microsoft Exchange Online Management
Microsoft Exchange Online Management
Microsoft Exchange Online: A Microsoft email and calendaring hosted service.Management: The act or process of organizing, handling, directing or controlling something.
4,609 questions
Microsoft Exchange Hybrid Management
Microsoft Exchange Hybrid Management
Microsoft Exchange: Microsoft messaging and collaboration software.Hybrid Management: Organizing, handling, directing or controlling hybrid deployments.
2,146 questions
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  1. Bruce Jing-MSFT 6,025 Reputation points Microsoft Vendor
    2024-11-13T02:57:11.2+00:00

    Hi,@Legall, Dominique

    Thanks for posting your question in the Microsoft Q&A forum.

    Based on your description, it seems that you have set up the organization relationship correctly, but there may be some problems with the configuration.

    In order to better solve your problem, I need to confirm a few questions with you:

    1.What version of Exchange server are you using in the hybrid?

    2.Can't Exchange Online Tenant see the calendars of all hybrid tenants?Can they see the calendar information of Online tenants in hybrid?

    3.Can on-pre tenants and online tenants in Hybrid see each other's calendar information?

    4.There seems to be something wrong with the link you provided. Could you please provide it again?

    Your answer is very important to narrow down the problem, thank you for your support and understanding.


  2. Legall, Dominique 5 Reputation points
    2024-11-13T08:37:26.53+00:00

    Hi there,

    1. Exchange 2016 Version 15.1 (Build 2507.6)
    2. The mailboxes of the hybrid tenant are all in the cloud. There are no on prem mailboxes. Online tenant cannot see the mailboxes of the hybrid tenant. However, hybrid tenant can see the mailboxes of the online tenant.
    3. See Answer 2
    4. https://learn.microsoft.com/en-us/exchange/sharing/organization-relationships/create-an-organization-relationship

    Many thanks in advance!

    Regards,

    Dominique

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