sp_msx_defect (Transact-SQL)
Applies to: 
SQL Server
Removes the current server from multiserver operations.
Caution
sp_msx_defect edits the registry. Manual editing of the registry isn't recommended, because inappropriate or incorrect changes can cause serious configuration problems for your system. Therefore, only experienced users should use the Registry Editor program to edit the registry. For more information, see the documentation for Microsoft Windows.
Transact-SQL syntax conventions
Syntax
sp_msx_defect [ [ @forced_defection = ] forced_defection ]
[ ; ]
Arguments
[ @forced_defection = ] forced_defection
Specifies whether to force the defection to occur if the Master SQLServerAgent has been permanently lost due to an irreversibly corrupt msdb database, or no msdb database backup. @forced_defection is bit, with a default of 0, which indicates that no forced defection should occur. A value of 1 forces defection.
After you force a defection by executing sp_msx_defect, a member of the sysadmin fixed server role at the Master SQLServerAgent must run the following command to complete the defection:
EXEC msdb.dbo.sp_delete_targetserver
@server_name = 'tsx-server',
@post_defection = 0;
Return code values
0 (success) or 1 (failure).
Result set
None.
Remarks
When sp_msx_defect properly completes, a message is returned.
Permissions
To execute this stored procedure, a user must be a member of the sysadmin fixed server role.