Single free/busy replica found
Topic Last Modified: 2005-12-15
The Microsoft® Exchange Server Analyzer Tool queries the Exchange_PublicFolder Microsoft Windows® Management Instrumentation (WMI) class under the root\MicrosoftExchangeV2 namespace to determine the number of free/busy replicas that are present in each administrative group.
If the Exchange Server Analyzer finds that only a single free/busy replica exists in an administrative group, the Exchange Server Analyzer displays a best practice message.
It is generally recommended that more than one replica of the free/busy folder exist in each administrative group. Sometimes multiple free/busy replicas can increase performance and resilience. In large Exchange organizations, a single replica of free/busy data may become overloaded. In all Exchange organizations, a single replica of the free/busy data is a single point of failure.
It is recommended that multiple replicas be used despite the following considerations:
Multiple replicas cause additional replication traffic over the network.
The risk of scheduling conflicts increases with multiple replicas.
At a minimum, there should be one replica for every 10,000 mailboxes.
For more information about free/busy folders and publishing free/busy information, see "Working with Exchange Server 2003 Stores" (http://go.microsoft.com/fwlink/?LinkId=47595).