Event ID - 9611

Event Id9611
SourceExchange VSS Writer
DescriptionError code 0x8004010f when freezing the Storage groups.
Event InformationAccording to Microsoft:

This problem may occur if all the following conditions are true when the Volume Shadow Copy Service requestor in the third-party backup program uses Volume Shadow Copy Service to back up or to restore selected Exchange 2003 storage groups:
You use volume mount points for Exchange 2003 data storage.
The volume that you try to back up has multiple globally unique identifiers (GUIDs) in the mount-manager database.
The volume mount point refers to a GUID that is not the first GUID for the volume in the mount-manager database.
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article.
Reference LinksA backup or a restore operation of Exchange 2003 storage groups fails with event IDs 9609 and 9611 when you use Windows Server 2003 Volume Shadow Copy Service

Exchange Server 2003 data backup and Volume Shadow Copy services

Volume Mount Point Support for an Exchange Server 2003 Cluster on a Windows Server 2003-based System

Description of the standard terminology that is used to describe Microsoft software updates

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