No sysadmin access Microsoft SQL server error 18461


Login failed for user reason single user mode only one administrator can connect at this time

Microsoft SQL server error 18461


You might get a situation that no sysadmin access to SQL server and server installed by someone. Breaking SQL server and adding SA sysadmin of yourself by SQLCMD. You should be OS administrator.


First find out ‘Binn’ folder where it is installed C or D drive. Better search in my computer.

Open a CMD with administrator

Type: cd /d E:\Program Files\Microsoft SQL Server\130\Tools\Binn


1.Stop the SQL server service

2.Start the service in Single user mode by adding ‘;-mSQLCMD’ to the parameters from SQL server configuration manager — right click SQL service — property — Advance — Startup parameters.


Type: SQLCMD -S SQLserver name -E

ex: sqlcmd -S.\Instance name

USE [master]





ALTER SERVER ROLE [sysadmin] ADD MEMBER [domain\user]

GoSysadmin Access

I’m currently working as a SQL server DBA in one of the top MNC. I’m passionate about SQL Server And I’m specialized in Administration and Performance tuning. I’m an active member of SQL server Central and MSDN forum. I also write articles in SQL server Central. For more Click here

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