You can install Mail Security on a Clustered Continuous Replication cluster.
To install Mail Security on a Clustered Continuous Replication cluster
Log on to a node using an Administrator account that is a member of the Domain and Local Admin groups.
Insert the Mail Security product CD into the CD-ROM drive.
The installation directory should be on a local node (non-shared drive).
In the Web Service wizard, type the IP address of the externally accessible network card of the current node (if not already present).
The Virtual Server IP address, the cluster IP address, or name of the node are invalid entries.
Select No when the SMSMSE installation in a CCR cluster prompts whether to install cluster resource else, the cluster resource might impair the Exchange EWS cluster group.
Restart the cluster service after you install Mail Security on each node of the cluster.
Add each node to asset management so that you can manage the node from the console.
Mail Security does not automatically detect the nodes in a cluster. Nodes must be added to asset management using their IP address.