Resolving CredSSP Authentication Error (0x507) on Windows Server 2008 SP2

Abstract: Learn how to resolve the CredSSP authentication error (0x507) when using Remote Desktop Protocol (RDP) on a legacy server running Windows Server 2008 SP2 (32-bit).

Created: 2025-04-24 by UserComp.com Editors

Managing a Legacy Server Running Windows Server 2008 SP2 (32-bit) with Remote Desktop Protocol (RDP) Authentication Error (CredSSP, Error Code: 0x507)

Overview

This article provides a detailed context on managing a legacy server running Windows Server 2008 SP2 (32-bit) with Remote Desktop Protocol (RDP) authentication error CredSSP (error code: 0x507). It covers key concepts, subtopics, and paragraphs, using appropriate HTML tags. Code blocks are enclosed within <code> tags, properly formatted according to the programming language, including indentation and tabulation needed. Exclude the H1 tag title provided separately.

CredSSP Authentication Error (0x507)

When connecting to a legacy server running Windows Server 2008 SP2 (32-bit) using Remote Desktop Protocol (RDP), you might encounter an authentication error with the error code 0x507. This issue is related to the CredSSP (Credential Security Support Provider) protocol.

Troubleshooting Steps

Update the CredSSP Protocol: Microsoft has released updates for the CredSSP protocol to address this issue. Ensure your server is up-to-date with the latest security updates and hotfixes.
Configure Group Policy Settings: Modify the Group Policy settings to disable the use of CredSSP for authentication. Follow these steps:

a. Open the Group Policy Management Editor.

b. Navigate to Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Security.

c. Locate the policy Network level authentication and set it to Disabled.

d. Locate the policy Require user authentication for remote connections by using Network Level Authentication and set it to Disabled.

e. Locate the policy Minimum session security for Remote Desktop connections and set it to Require user authentication for Remote Desktop connections (more secure).
Use RDP Alternative (RDP Wrapper): If updating and configuring Group Policy settings do not resolve the issue, consider using an RDP wrapper like X2Go or AnyDesk that provides an alternative to the native RDP client and does not rely on the CredSSP protocol.

References

Tags: Windows Server 2008 SP2 RDP CredSSP

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