Replication messages at startup has been Enabled

[This topic is intended to address a specific issue called out by the Exchange Server Analyzer Tool. You should apply it only to systems that have had the Exchange Server Analyzer Tool run against them and are experiencing that specific issue. The Exchange Server Analyzer Tool, available as a free download, remotely collects configuration data from each server in the topology and automatically analyzes the data. The resulting report details important configuration issues, potential problems, and nondefault product settings. By following these recommendations, you can achieve better performance, scalability, reliability, and uptime. For more information about the tool or to download the latest versions, see "Microsoft Exchange Analyzers" at]  

Topic Last Modified: 2010-07-21

The Microsoft® Exchange Best Practices Analyzer Tool reads the following registry entry to determine whether Exchange has been configured to generate status request messages for the public folder hierarchy:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExchangeIS\<Server name>\Public-<Public Information Store GUID>\Enable Replication Messages At Startup

If the Analyzer tool finds the Enable Replication Messages At Startup registry entry present and configured, a non-default configuration message is displayed.

In Exchange Server 5.5, each computer that has a public folder store sends a nightly status request message to determine the state of the public folder hierarchy. Microsoft Exchange 2000 Server and Microsoft Exchange Server 2003 do not do this. Typically, in Exchange 2000 Server, in Exchange Server 2003, in Microsoft Exchange Server 2007 and in Microsoft Exchange Server 2010, the status request message is sent out only one time during the lifetime of the public folder store. It is sent when the store is created.

However, in certain circumstances you may have to generate a status request message. For example, if the public folder hierarchy on the Exchange 2000 Server or later computer does not seem to replicate, or the public folder hierarchy replicates very slowly, the generation of a status request message may permit the public folder hierarchy replication to continue. Issues with public folder hierarchy replication may occur if the original status request message that was sent when the public folder store was created was dropped and never acknowledged, or if the message was sent to a server with a significantly incomplete hierarchy.

This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore the registry if a problem occurs. For information about how to restore the registry, view the "Restore the Registry" Help topic in Regedit.exe or Regedt32.exe.

  1. Open a registry editor, such as Regedit.exe or Regedt32.exe.

  2. Locate the following subkey: HKLM\System\CurrentControlSet\Services\MSExchangeIS\<Server name>\Public-<Public Information Store GUID>

  3. Examine, or if desired, change the Enable Replication Messages At Startup value. This REG_DWORD value must be set to 1 to take effect. If you set the value to 0 (the default setting), no status request message is sent when the public information store starts.

  4. If a change is made, close the registry editor, and then dismount and remount the public information store for the change to take effect.

Before you edit the registry, and for information about how to edit the registry, see the Microsoft Knowledge Base article 256986, "Description of the Microsoft Windows Registry" (

For more information about public folder replication status messages and the Enable Replication Messages At Startup registry value, see the following Microsoft Knowledge Base articles:


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