Error 15401 Sql Server 2008 R2
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SERVER - Fix : Error : Error 15401: Windows NT user or group ‘username' not found. Check the name again. June 7, 2007Pinal DaveSQL, SQL Server, SQL Tips and Tricks24 commentsFix : Error : Error 15401: Windows NT
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user or group ‘username' not found. Check the name again.This is quite a sql server 2008 r2 end of life famous error and I was asked to write about it by couple of readers. The reason I was not
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writing about this as the solution of this error is very well explained in Book On Line. All the potential causes and their solutions are explained well here. This post/article should https://support.microsoft.com/en-us/kb/2770837 be considered as book mark to solution.Fix/WorkAround/Solution: Refere Microsoft Help and Support : How to troubleshoot error 15401Reference : Pinal Dave (http://blog.SQLAuthority.com) Tags: SQL Error Messages, SQL Login, SQL Scripts1Related Articles SQLAuthority News - Presenting at Virtual Tech Days TechEd Pre-Con - February 9, 2011 February 7, 2011Pinal Dave SQL SERVER - 2008 - Interview Questions and Answers - Part 6 September 17, 2008Pinal http://blog.sqlauthority.com/2007/06/07/sql-server-fix-error-error-15401-windows-nt-user-or-group-username-not-found-check-the-name-again/ Dave SQL SERVER - Count Duplicate Records - Rows July 11, 2007Pinal Dave 24 comments. Leave new Nebu June 8, 2008 5:23 pmpls slove this errorWindows NT user or group ‘username’ not found. Check the name again.Reply David April 13, 2009 4:45 pmHi,I have one suggestion, now that it works for me. I was unable to add a new login for a local windows user on a local sql server just because of case. The Sql Server management studio process would always give my user login like this : AMITY\Dave. In fact, the right case is Amity\Dave.By executing sp_grantlogin "Amity\Dave" it worked fine.Bad GUI tools don't ease the use at all.DavidReply Alice April 30, 2009 12:51 amHi Pinal,I got this err when I tried to manually change the Window group name after the physical server got renamed.After renaming the server, I use sp_dropserver and sp_addserver to bring SQL in sync with the new server name. Then I restart SQL Server. Everything seems to work fine. However, under Security -> Logins there are 3 groups that are prefixed by the old server name and also contain the old serve
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you may see error Windows NT user or group 'Domain\User' not found. Check the name again. (Microsoft SQL Server, Error: 15401). This error message is very general and it does not explain any specific problem or reason itself. Microsoft has a very good article to fix this issue at http://support.microsoft.com/kb/324321/en-us. However, there is another scenario which is not covered in above article (at the time when writing this article) or may be I am the first person who faced this issue. This scenario can be reproduced on Windows 2008 Server with SQL 2008 Server where the Domain Controller is Windows 2000 server. On Windows 2008 server, 2 new policies have been enabled by default that encrypts the secure channel data when new LOGIN request is sent to Domain Controller by Domain member(Also SQL Server). In this scenario, Domain Controller is Windows 2000, thus it does not understand the encrypted request thus refuses the LOGINrequest. All you need to do is to fix this behavior in Windows 2008 (SQL Server) to not to send encrypted secure channel data to Domain Controller. To do this follow the steps below and it should fix the issue. From the SQL Server running Windows 2008 R2, Click Start-> Run and type the command GPEDIT.MSC. This will open the Policy Editor. From Policy Editor Expand "Computer configuration" - > Windows Settings -> Security Setttings -> Local Policies -> Security Options. You will see all security policies on right hand side window. Make changes into the following two policies. Domain member: Digitally encrypt secure channel data (when possible) - Disable this policy Domain member: Digitally sign secure channel data (when possible) - Disable this policy After making these changes, close the policy editor and reboot the box. (Not SQL Server, but restart entire system). In case your local policy does not allow you to make changes, you may have to make changes using Group Policy Management Console. Instructions to install GPMC are located at http://blogs.technet.com/askds/archive/2008/07/07/instal