On-premises users can't consistently view free/busy information for Office 365 users in a hybrid deployment
Note The Hybrid Configuration wizard that's included in the Exchange Management Console in Microsoft Exchange Server 2010 is no longer supported. Therefore, you should no longer use the old Hybrid Configuration wizard. Instead, use the Office 365 Hybrid Configuration wizard that's available at http://aka.ms/HybridWizard. For more information, see Office 365 Hybrid Configuration wizard for Exchange 2010.
You have a hybrid deployment of on-premises Microsoft Exchange Server and Microsoft Exchange Online in Microsoft Office 365. However, on-premises users can't consistently view free/busy information for Office 365 users. On-premises users experience one or more of the following symptoms:
- Free/busy information for Office 365 users is displayed for four to six hours, but the information isn't displayed after that time.
- Free/busy information for Office 365 users is displayed as hash marks in the Scheduling Assistant in Microsoft Outlook.
Additionally, the RPC Client Access logs on the public folder server show the following error message:
<Date> <Time>.000Z,505,4,/O=TailspinToys/ou=External (FYDIBOHF25SPDLT)/cn=Recipients/cn=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx,,OUTLOOK.EXE,11.0.6352.0,Classic,,,ncacn_ip_tcp,,,-2147024891 (rop::AccessDenied),00:00:02.8234733,,"RopHandler: FindRow: [AccessDeniedException] Cannot save changes made to an item to store. -> [MapiExceptionNoAccess] MapiExceptionNoAccess: Unable to save changes. (hr=0x80070005, ec=-2147024891) "
On the Exchange 2010 hybrid server, change the permissions for the External (FYDIBOHF25SPDLT) public folder replica to Editor. For more information about how to do this, see the following Microsoft TechNet article:
This issue occurs if the default client permissions of the External (FYDIBOHF25SPDLT) public folder replica aren't set to Editor. By default, the permissions for the public folder replica are set to Author on the Exchange 2010 hybrid server.
If the permissions are set to anything that's lower than Editor, the RPC Client Access service on the Exchange 2010 public folder server can't write the availability information that the service retrieved from the federated organization to the External (FYDIBOHF25SPDLT) public folder replica.
For more information about cross-organization availability scenarios, see the following Exchange Team Blog article:
- Make sure that there's an Exchange 2010 mailbox server that hosts a public folder database.
- If it's not already present, create a free/busy folder that's named External (FYDIBOHF25SPDLT), and make sure that the only replica of the folder is located on the Exchange 2010 server.
- Connect to the on-premises Exchange 2010 public folder server.
- Open Windows PowerShell, and then run the following commands:
Article ID: 2758215 - Last Review: 05/10/2016 09:29:00 - Revision: 9.0
Microsoft Exchange Online, Microsoft Exchange Server 2010 Enterprise, Microsoft Exchange Server 2010 Standard
- o365 hybrid o365022013 KB2758215