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28  Installation for Microsoft Exchange 2003 Getting Started Guide
Screenshot 24 - Selecting the default anti-spam action to use
6. In the Default anti-spam action dialog select the default action to
be taken when emails are detected as spam. Click Next to continue.
7. Click Finish to finalize the installation.
The GFI MailEssentials installation is now complete and the anti-spam
system is up and running. For more information about how to optimize
GFI MailEssentials refer to Post-install actions chapter.
3.6 Installing on Microsoft Exchange 2003 cluster
Introduction
A cluster is a group of servers, technically known as nodes, working
collectively as a single server. Such environment provides high
availability and fail over mechanisms to ensure constant availability of
resources and applications including email infrastructures. If one of
the nodes in the cluster fails/is not available, resources and
applications switch to another cluster node.
A Microsoft Exchange cluster can be set up in one of 2 modes:
active/active or active/passive. GFI MailEssentials supports ONLY
active/passive clusters. In an active/passive cluster, a „failover‟
mechanism ensures that whenever an active cluster fails, one of the
available passive nodes becomes active (i.e. takes over the role of the
failed node).
In view of the way clusters work, GFI MailEssentials must be installed
on all servers/cluster nodes in order to ensure uninterrupted email
spam management. GFI MailEssentials installation in a Microsoft
Exchange 2003 cluster is a 4-tier process: