Veeam B&R 9.5 U2 – Failed to index guest file system

Since Veeam Backup and Replication 9.5 Update 2 had been released, Veeam’s support received this error from some end-users: “Failed to Index guest file system. VSSControl: Index Failed” during backing up (Veeam B&R 9.5 U2 – Failed to index guest file system). The issue is confirmed (upgraded from Veeam B&R 9.5 Update 1 to Update 2), the hotfix for Veeam B&R v9.5 u2 (104602) is available through support and is planned to be included into one of the next updates (Veeam B&R 9.5 Update 3).

Warning message: “Failed to index guest file system. VSSControl: Index failed”.

Solution – Apply this patch :

  • First, you have to stop every Veeam services (services.msc).
  • Then, you can replace the original file: “Veeam.Backup.VssProvider:dll” file, located in “C:\Program Files\Veeam\Backup and Replication\Backup” folder by this one: FIX 104602. You have to keep the same file name.
  • Note: Keep the source file as “Veeam.Backup.VssProvider:dll_old“.
  • Finally, you can run every Veeam services.

No more warnings!

Veeam Backup and Replication 9.5 Update 2 contains some significant improvements: Cisco HyperFlex Systems (formerly HX-Series/SpringPath) support for Backup from Storage Snapshots functionality, HPE 3PAR StoreServ 3.3.1 support and improved scalability by migrating some API calls from SSH to RESTful API, Microsoft Hyper-V BigEndian platform support, Microsoft Exchange 2016 CU5 support for mailbox item recovery with Veeam Explorer for Microsoft Exchange, NetApp ONTAP 9.1 support, Oracle 12.2 support for all Oracle database backup and restore functionality, Veeam Agent for Linux 1.0 Update 1 (build support, including new 1-Click FLR via Veeam Backup Enterprise Manager, Veeam Agent for Microsoft Windows 2.0 (build support, including application-item recovery support from agent backups, VMware vCloud Director 8.20 support and VMware vSAN 6.6 support.

You can learn more about Veeam Backup & Replication 9.5 U2 new features here.

Veeam Availability Suite 9.5 first full availability solution! Full description!

You can learn more about Veeam Backup & Replication 9.5 here.

You can learn more about Veeam Availability Suite 10 and VeeamON 2017 announcements here.

Veeam Agent for Windows step by step installation guide.

If you need to disable UAC Server on Windows Server 2016 Script Guide.


Christopher GLEMOT

Data Management & Security Team Leader | Technical specialist around Data, Security, Backup, Disaster Recovery, Cloud, Governance, Virtualization and Storage | Veeam Vanguard 2016-21 & VMCE | Founder of | Owner of
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