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NetVault Backup Plug-in for Exchange 12.3 - Release Notes

Quest® NetVault® Backup Plug-in for Exchange 12.3

Quest® NetVault® Backup Plug‑in for Exchange 12.3
These release notes provide information about the Quest® NetVault® Backup Plug‑in for Exchange release.

About this release

Quest NetVault Backup (NetVault Backup) Plug‑in for Exchange (Plug‑in for Exchange) 12.3 is a minor release, with enhanced features and functionality. For complete product documentation, visit


Added support for Exchange Server running on Windows Server 2019.


Added support for Exchange Server 2019 on-premises running on Windows Server 2019 or later.


Added support for Exchange Server 2016 CU11, CU12, and CU13.

DNPE-742, DNPE-743

Added support for Exchange Server 2019 CU1 and CU2.


For a Database Availability Group (DAG) environment, updated the Validation Threshold setting in the plug-in to reduce the size of monitor messages exchanged between the plug-in processes. This change reduces the potential for proxy errors, such as Proxy Master on DAG member server ‘<ServerName>’ died unexpectedly.


Added support for targeting software-defined Quest QoreStor™ storage devices. For more information on creating and using QoreStor devices, see the Quest NetVault Backup Administrator’s Guide.


Validated support for restoring data to a Recovery Database (RDB) across nodes in a DAG environment.


Known issues

For a standalone machine, if an offhost backup failed or was aborted after successful mapping of the LUN storage, then LUN does not get unmapped from the offhost client. Instead, it continues to add multiple LUNs on the offhost client for every similar backup failure.

Workaround: To remove the excess volumes, complete the following steps:

Under the Storage tab, expand the server node.
Select that server and click the Volume tab in right pane.
Under the Storage tab, select Expand Volume.


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