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This article describes how to use the Microsoft Exchange Server InterOrg Replicator utility to share free and busy and public folder information. The InterOrg Replicator utility consists of two programs, the Microsoft Exchange Server Replication Configuration utility (Exscfg.exe), and the Microsoft Exchange Server Replication Service (Exssrv.exe). Using these programs, you can coordinate meetings, appointments, and contact information between members of two different Exchange Server organizations. Additionally, message types can automatically be converted to posts and added to public folders, which can then be replicated.
Using a configuration file created by the Replication Configuration utility, the Replication Service continuously updates information from one server (designated as the publisher) to one or more Exchange Server computers (designated as subscribers). Schedule+ free and busy information is replicated from publisher to subscriber only. For this reason, you must have two free and busy sessions to bi-directionally update free and busy information. Public folders can be replicated from publisher to subscriber or bi-directionally. You can configure the replication frequency as well as message and folder replication logging, and how much processing power you want devoted to the replication process.
There are a number of steps you can take if you encounter problems with the InterOrg Replicator tool.
For additional information about installing, configuring, and using the InterOrg Replicator tool, click the article number below to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/238573/EN-US/ )XADM: Installing, Configuring, and Using the InterOrg Replicator Tool