Cross-premises Calendar editing is unavailable in a hybrid deployment of Exchange Online in Office 365 and on-premises Exchange Server

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Article ID: 2807149 - View products that this article applies to.
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In a hybrid deployment of on-premises Microsoft Exchange Server and Microsoft Exchange Online in Microsoft Office 365, you can configure free/busy information sharing so that on-premises users and cloud-based users can see each other's availability in Microsoft Outlook or Outlook Web App.

However, you can't grant permissions to create or edit items in another user's calendar cross-premises. That is, cloud-based users can't edit the calendars of on-premises users, and on-premises users can't edit the calendars of cloud-based users. For this level of access, especially when one user must act as a delegate for another user, both mailboxes must exist in your on-premises Exchange organization, or both mailboxes must exist in your Office 365 organization.

To move an on-premises mailbox to the cloud-based organization, or to move a cloud-based mailbox back to the on-premises organization, run the New Remote Move Request Wizard in the Exchange Management Console on the hybrid server. For more information about mailbox migration between the on-premises organization and the cloud-based organization, see the following wiki post in the Office 365 Community:
Exchange hybrid deployment – moving cloud-based mailboxes to the on-premises organization


Error messages that users may receive when they try to grant Write-level permissions or perform Write-level actions (such as deleting an appointment in another user's calendar in Outlook or Outlook Web App) include the following:
  • One or more users cannot be added to the folder access list. Non-local users cannot be given rights on this server
  • You cannot make changes to the contents of this read-only folder
  • You don't have the appropriate permission to perform this operation
Note Calendars are shared across organizations are read-only. The owners of these calendars aren't added to a meeting invitation when you click New Meeting with All in the Outlook calendar. To fix this, manually add the owners to the meeting invitation.

Still need help? Go to the Office 365 Community website.


Article ID: 2807149 - Last Review: February 7, 2014 - Revision: 5.0
Applies to
  • Microsoft Office 365 for enterprises (pre-upgrade)
  • Microsoft Office 365 for education  (pre-upgrade)
  • Microsoft Exchange Online
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