---
title: "Microsoft SQL - Authentication Fails in Retrospect 7.6 and later (Windows)"
slug: "microsoft-sql-authentication-fails-in-retrospect-76-and-later-windows"
updated: 2023-11-08T00:46:46Z
published: 2023-11-08T00:47:44Z
canonical: "docs.retrospect.com/microsoft-sql-authentication-fails-in-retrospect-76-and-later-windows"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.retrospect.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Microsoft SQL - Authentication Fails in Retrospect 7.6 and later (Windows)

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Retrospect requires SQL-DMO components that are not automatically installed with SQL 2008 and later. Without the required Microsoft configuration, Retrospect will report authentication failures when trying to license the databases under Configure>volumes.

To fix the problem, users need to download and install the "Microsoft SQL Server 2005 Backward Compatibility Components" package to the Server running SQL Server 2008 and later.

## Installation Instructions

Contact Support for a download link for the x86 installer or the x64 installer, depending on your configuration.

Install the Microsoft SQL Server 2005 Backward Compatibility Components.

Open Retrospect and go to Configure>Volumes. Right click on your SQL server and select License to apply your SQL license and authenticate to the server.

Last Update: March 25, 2020