Change Default Schema for all users

SELECT
'Alter user [' + u.name + '] with default_schema = dbo' as command,
u.name AS [Name],
'Server[@Name=' + quotename(CAST(serverproperty(N'Servername') AS sysname),'''') + ']' + '/Database[@Name=' + quotename(db_name(),'''') + ']' + '/User[@Name=' + quotename(u.name,'''') + ']' AS [Urn],
u.principal_id AS [ID],
CAST(CASE dp.state WHEN N'G' THEN 1 WHEN 'W' THEN 1 ELSE 0 END AS bit) AS [HasDBAccess],
u.create_date AS [CreateDate]
FROM
sys.database_principals AS u
LEFT OUTER JOIN sys.database_permissions AS dp ON dp.grantee_principal_id = u.principal_id and dp.type = N'CO'
WHERE
(u.type in ('U', 'S', 'G', 'C', 'K'))
and name not in ('sys','dbo','guest','INFORMATION_SCHEMA')
ORDER BY
[Name] ASC