Article ID: 981961 - View products that this article applies to.
You use Microsoft Exchange Server Inter-Organization Replication (IOREPL) to replicate Free/Busy information in a mixed Microsoft Exchange Server 2003 and Microsoft Exchange Server 2010 environment. In this situation, the Free/Busy replication from an Exchange Server 2003 server to an Exchange Server 2010 server fails. Additionally, you find the following event is logged on the Exchange Server 2010 server:
This problem occurs because Exchange Server 2010 validation fails on the RPC Client Access service. The validation fails if the replication item is located in the root folder.
To resolve this problem, install the following update rollup:
(https://support.microsoft.com/kb/982639/ )Description of Update Rollup 4 for Exchange Server 2010
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 981961 - Last Review: November 11, 2011 - Revision: 3.0