Hi, I am writing a code to check the type of cluster(i.e. whether it is a CCR cluster or SCC). I want to fetch this information from registry only. But I am not able to find any information for this in registry. Can any one help to get these value from registry? Regards, Nitin Singhal

You can see below reg value in CCR node: 'SYSTEM\CurrentControlSet\Services\MSExchangeSA\Parameters\OABGen-Server\EnableOabGenOnThisNode'Anil MCC 2011,ITIL V3,MCSA 2003,MCTS 2010, My Blog : http://messagingschool.wordpress.com

Thanks for your quick response, I checked my CCR environment but "OABGen-Server" is not available there. In my CCR machine I can see "SYSTEM\CurrentControlSet\Services\MSExchangeSA\Parameters\EXchCCR" registry key having "EnableOabGenOnThisNode" as string value. Where "EXchCCR" is Cluster Mailbox server name. My main concern is to check if the current server node is configured in SCC or not.

Hi, Yes, you can get some values from register to distinguish them: In SCC cluster Servers, the setup process will create the following registry value 'SYSTEM\CurrentControlSet\Services\MSExchangeSA\Parameters\{Clustered-Mailbox-Server name}\OabDropFolderLocation' which is the shared registry location between the server nodes, and points to the existing path on shared storage. Regardless of which node is active at the moment OABGen kicked off, the process will be able to find both the registry key and the path to drop location. In CCR cluster Servers, the Exchange setup process creates the registry value 'SYSTEM\CurrentControlSet\Services\MSExchangeSA\Parameters\OABGen-Server\EnableOabGenOnThisNode' which contains name of the node installed first, and from now on assumed as ‘primary’ cluster node. For more, you can refer to the article ‘OAB Generation on a cluster server fails with event id 9395 or 9396’. Hope this helps. ThanksSophia Xu