Cannot remove Exchange 2007 active cluster (GxClusPlugIn)

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Hi

We are coming towards the end of our Exchange upgrade project.  The best part about these projects is removing old services and getting rid of old hardware or freeing space on the SAN array.

Whilst trying to decommission our old Exchange 2007 CCR cluster, I received the following error message

Welcome to Microsoft Exchange Server 2007 Unattended Setup

Preparing Exchange Setup

The following server roles will be removed

Clustered Mailbox ServerMailbox Role
Management Tools
Performing Microsoft Exchange Server Prerequisite Check

Clustered Mailbox Role Checks ......................... FAILED

The clustered mailbox server removal cannot continue: The specified clustered mailbox server exists, but its resource group contains at least one non-Exchange cluster resource (GxClusPlugIn (mail) (Instance001)).Mailbox Role Checks ......................... COMPLETED

The Exchange Server Setup operation did not complete. For more information, visit http://support.microsoft.com and enter the Error ID.

Exchange Server setup encountered an error.

Ok, slightly cryptic. This is what I have completed up to this point

Removed Exchange from passive node
Evicted passive node from Cluster
Attempt to remove Exchange from active node with the following command
Setup.com /mode:uninstall /removeCMS /CMSName:mail

So....what the heck is GxClusPlugin? I start looking around "Programs and Features" and remember we use Galaxy Commvault for backups. A quick Google search confirms my theory.

So I remove the GXClusPlugin from add/remove programs.

Once I removed these items from the server, I tried to remove Exchange once again....Bingo it works!

Welcome to Microsoft Exchange Server 2007 Unattended Setup

Preparing Exchange Setup

The following server roles will be removed

Clustered Mailbox Server
Mailbox Role
Management Tools

Performing Microsoft Exchange Server Prerequisite Check

Clustered Mailbox Role Checks ......................... COMPLETED
Mailbox Role Checks ......................... COMPLETED

Configuring Microsoft Exchange Server

Clustered Mailbox Server ......................... COMPLETED
Mailbox Server Role ......................... COMPLETED
Exchange Management Tools ......................... COMPLETED
Removing Exchange Files ......................... COMPLETED

The Microsoft Exchange Server setup operation completed successfully.


Sam

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