Veeam Support Knowledge Base
Backup job reports Unfreeze Error (Over VIX)

Backup job reports Unfreeze Error (Over VIX)

KB ID:	1787
Product:	Veeam Backup & Replication
Version:	6.x, 7.x
Published:	2013-07-08
Last Modified:	2020-08-13

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Challenge

Backup job returns an error:
Unfreeze error (over VIX): [Backup job failed.]

Running vssadmin list writers command may result in:
Non-Retryable error for Volume Shadow Copy Service (VSS) of the Microsoft® Exchange Replication service

Cause

This issue is Microsoft-related and occurs when the VSS writer in charge of Microsoft Exchange Replication fails.

Solution

Reinstall or perform a repair-install of VMware Tools.
Reboot guest operating system of the backed-up VM if possible.
In case neither of the above solutions work, see the VMware KB explaining how to troubleshoot VSS-related issues.
In case none of the above helps, please contact MS Support for further assistance.

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