[ @loginame = ] 'login'

Is the name of the login being added to the fixed server role. login is sysname, with no default. login can be a SQL Server login or a Windows login. If the Windows login has not already been granted access to SQL Server, access is automatically granted.

[ @rolename = ] 'role'

Is the name of the fixed server role to which the login is being added. role is sysname, with a default of NULL, and must be one of the following values:

• sysadmin
  
• securityadmin
  
• serveradmin
  
• setupadmin
  
• processadmin
  
• diskadmin
  
• dbcreator
  
• bulkadmin
  

0 (success) or 1 (failure)

When a login is added to a fixed server role, the login gains the permissions associated with that role.

The role membership of the sa login and public cannot be changed.

Use sp_addrolemember to add a member to a fixed database or user-defined role.

sp_addsrvrolemember cannot be executed within a user-defined transaction.

Requires membership in the role to which the new member is being added.

The following example adds the Windows login Corporate\HelenS to the sysadmin fixed server role.

EXEC sp_addsrvrolemember 'Corporate\HelenS', 'sysadmin';
GO

Reference

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