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Asked: 2026-06-07T10:40:09+00:00

I found a user in mssql 2008 database – domain\testuser2 with login domain\testuser2. But

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I found a user in mssql 2008 database – domain\testuser2 with login domain\testuser2.

But I couldn’t find this login by using Mssql Management Studio or in the system tables (sys.server_principals, sys.syslogins, sys.linked_logins, sys.remote_logins).

When I try to make another user with this login (CREATE USER _test FOR login [domain\testuser2]), the error is following: The login already has an account under a different user name.

So, this login is exist. Where could I find it? Is there some system tables or views?

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  1. Editorial Team

    I’ve solved this problem.

    In MSSQL you can create database users with Windows Authentification without logins.

    For example, you can successfully execute the following sql-query (even you haven’t sql-login [MyDomainName\myWinLogin])

    CREATE USER [MyDomainName\myWinLogin]
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