As the title suggests I’m having problems changing the authentication mode from Windows to both SQL Server and Windows mode in version 12.0.2. I have tried right right-clicking the server, go to security and change it there but I’m getting an error when doing this. I installed it originally using both but changed it to windows only mode earlier this evening.
The error message I’m getting is long winded but the end of it is:
The EXECUTE permission was denied on the object ‘xp_instance_regwrite’, database ‘mssqlsystemresource’, schema ‘sys’. (Microsoft SQL Server, Error; 229)
Any idea what that means? I’m guessing I don’t have the required permission but I’m not familiar enough with it to know what to do next. I have the
sa password but can’t enter it while I’m stuck in Windows mode.
I’ve been trying to figure out why I can’t seem to write to the database all day and in desperation tried changing the mode to see if that would fix it… but it’s only made things worse.
While connected using Windows credentials I tried
ALTER LOGIN sa ENABLE also and was given the following error message in response:
Cannot alter the login ‘sa’, because it does not exist or you do not have permission.
I did try altering the registry too to change the mode but realised I was reading a post relating to SQL Server 2005
Thanks in advance for your help.
Here is the solution:
Using SQL Server Management Studio
To change security authentication mode
In SQL Server Management Studio Object Explorer, right-click the server, and then click Properties.
On the Security page, under Server authentication, select the new server authentication mode, and then click OK.
In the SQL Server Management Studio dialog box, click OK to acknowledge the requirement to restart SQL Server.
In Object Explorer, right-click your server, and then click Restart. If SQL Server Agent is running, it must also be restarted.
To enable the sa login
In Object Explorer, expand Security, expand Logins, right-click sa, and then click Properties.
On the General page, you might have to create and confirm a password for the login.
On the Status page, in the Login section, click Enabled, and then click OK.
To enable the sa login
In Object Explorer, connect to an instance of Database Engine.
On the Standard bar, click New Query.
Copy and paste the following example into the query window and click Execute. The following example enables the sa login and sets a new password.
ALTER LOGIN sa ENABLE ;
ALTER LOGIN sa WITH PASSWORD = '' ;
For More Details Click Here
Answered by Ghulam Qadir on November 21, 2021
The EXECUTE permission was denied on the object 'xp_instance_regwrite', database 'mssqlsystemresource', schema 'sys'. (Microsoft SQL Server, Error; 229)
You can fix the problem by granting the user direct access to the procedure.
USE master GO GRANT EXECUTE ON [sys].[xp_instance_regread] TO [DOMAINUSER]; --To veriy that the user has been granted the privilege EXECUTE AS USER = 'DOMAINUSER';Select * from fn_my_permissions('xp_instance_regread','Object')
Cannot alter the login 'sa', because it does not exist or you do not have permission.
Error message saying that, You do not have administrator's permissions
Log into SQL Server Management Studio as an Administrator, because only admin user has permission to change passwords for users.
How to change sa user password see here: How to change a password for the
sa user in MS SQL? and this link
Answered by CR241 on November 21, 2021
1 Asked on August 13, 2020 by gio
1 Asked on August 12, 2020 by g-iannello
1 Asked on August 3, 2020 by shr
Get help from others!