The installed version of MOUNTMGR.SYS is incompatible with Exchange Server
Topic Last Modified: 2006-06-06
Microsoft® Exchange Server 2007 setup cannot continue because the installed version of Mountmgr.sys is incompatible with Microsoft Exchange.
Exchange 2007 setup requires that the cluster node have the update referred to by Microsoft Knowledge Base article 898790 installed.
The version of Mountmgr.sys currently installed on the cluster node may cause volume mount point failures. This problem occurs because of a problem in the Mountmgr.sys driver. This is an intermittent timing problem that can occur when a volume arrives to be mounted to a mount point.
To resolve this issue, install the update referred to by Microsoft Knowledge Base article 898790 (http://go.microsoft.com/fwlink/?linkid=3052&kbid=898790), and then rerun Exchange 2007 setup.
For more information about this issue, see Microsoft Knowledge Base article 898790, "Volume mount points on disks in a server cluster may intermittently become unavailable after you install Windows Server 2003 Service Pack 1" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=898790).