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Getting Started Guide Installation for Microsoft Exchange 2003  29
 Process 1: Install GFI MailEssentials on the Active cluster node.
 Process 2: Stop the GFI MailEssentials Legacy Attendant and the
GFI POP2Exchange cluster resources and move the Exchange
Virtual Server cluster group resource to a passive/other node.
 Process 3: Install GFI MailEssentials on another cluster node.
 Process 4: Add specific GFI MailEssentials services to the
Exchange Virtual Server cluster resource group
Repeat Processes 2, 3 and 4 above for the remaining passive node(s)
in the cluster.
3.6.1 Upgrade from earlier version
If you are currently using a previous version of GFI MailEssentials
(versions 9, 10, 11, 12 and 14), you can upgrade your current
installation while at the same time retain all your existing configuration
settings.
Pre-upgrade actions
None
Important notes
 Upgrades cannot be undone i.e. you cannot downgrade to an
earlier version once you have installed the latest version.
 On upgrading an existing installation, licensing reverts to trial
version and a new fully purchased license key for the GFI
MailEssentials 2010 is required. For more information on new
license keys, refer to: http://customers.gfi.com
 You cannot change the installation path during GFI MailEssentials
upgrades.
 When upgrading from GFI MailEssentials 9, the current Bayesian
weights file will be upgraded to the new format used in GFI
MailEssentials 10 or later. The new format is more compact and
uses less memory. NO DATA WILL BE LOST.
 When upgrading in a Microsoft Exchange cluster environment, all
instances of GFI MailEssentials must be upgraded i.e. GFI
MailEssentials must be upgraded on all cluster nodes/servers
making part of the cluster.
Upgrade procedure
1. Launch GFI MailEssentials installation on the server where your
earlier version of GFI MailEssentials is installed.