Article ID: 555332 - Last Review: June 25, 2005 - Revision: 1.0

Login failed for user 'username'. The user is not associated with a trusted SQL Server connection. (Microsoft SQL Server, Error: 18452)

Author: Yuval Sinay MVP
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SYMPTOMS

During a logon process to SQL server the following error may appear: "Login failed for user 'username'. The user is not associated with a trusted SQL Server connection. (Microsoft SQL Server, Error: 18452)".

CAUSE

The SQL server has been configured to operate in "Windows Authentication Mode (Windows Authentication)" and doesn't allow
the use of SQL accounts.

RESOLUTION

Change the Authentication Mode of the SQL server from "Windows Authentication Mode (Windows Authentication)"
to "Mixed Mode (Windows Authentication and SQL Server Authentication)".

MORE INFORMATION

 
Authentication Modes
 
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/adminsql/ad_security_47u6.asp
 
INF: How to Connect to an SQL Server 2000 Named Instance with the Previous Version's Client Tools
 
http://support.microsoft.com/default.aspx?scid=kb;en-us;265808
 

APPLIES TO
  • Microsoft SQL Server 2000 Enterprise Edition
  • Microsoft SQL Server 2000 64-bit Edition
  • Microsoft SQL Server 2000 Standard Edition
Keywords: 
kbpubmvp kbpubtypecca kbhowto KB555332
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