SP_HELP_revlogin will give sql logins script with encripted password and SID. so, you have to run before restore. logins script you have to run after restore.

in this you are getting logins script when you restore the db source users overwrite on destination with this befrore restore you will get logins script right. after restore if you run the logins script it will sync up back.

below is the script

USE [master]

GO

/****** Object: StoredProcedure [dbo].[sp_hexadecimal] Script Date: 10/09/2012 14:50:19 ******/

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

CREATE PROCEDURE [dbo].[sp_hexadecimal]

@binvalue varbinary(256),

@hexvalue varchar (514) OUTPUT

AS

DECLARE @charvalue varchar (514)

DECLARE @i int

DECLARE @length int

DECLARE @hexstring char(16)

SELECT @charvalue = '0x'

SELECT @i = 1

SELECT @length = DATALENGTH (@binvalue)

SELECT @hexstring = '0123456789ABCDEF'

WHILE (@i <= @length)

BEGIN

DECLARE @tempint int

DECLARE @firstint int

DECLARE @secondint int

SELECT @tempint = CONVERT(int, SUBSTRING(@binvalue,@i,1))

SELECT @firstint = FLOOR(@tempint/16)

SELECT @secondint = @tempint - (@firstint*16)

SELECT @charvalue = @charvalue +

SUBSTRING(@hexstring, @firstint+1, 1) +

SUBSTRING(@hexstring, @secondint+1, 1)

SELECT @i = @i + 1

END

SELECT @hexvalue = @charvalue

GO

USE [master]

GO

/****** Object: StoredProcedure [dbo].[sp_help_revlogin] Script Date: 9/10/2012 6:23:51 PM ******/

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

CREATE PROCEDURE [dbo].[sp_help_revlogin] @login_name sysname = NULL AS

DECLARE @name sysname

DECLARE @type varchar (1)

DECLARE @hasaccess int

DECLARE @denylogin int

DECLARE @is_disabled int

DECLARE @PWD_varbinary varbinary (256)

DECLARE @PWD_string varchar (514)

DECLARE @SID_varbinary varbinary (85)

DECLARE @SID_string varchar (514)

DECLARE @tmpstr varchar (1024)

DECLARE @is_policy_checked varchar (3)

DECLARE @is_expiration_checked varchar (3)

DECLARE @defaultdb sysname

IF (@login_name IS NULL)

DECLARE login_curs CURSOR FOR

SELECT p.sid, p.name, p.type, p.is_disabled, p.default_database_name, l.hasaccess, l.denylogin FROM

sys.server_principals p LEFT JOIN sys.syslogins l

ON ( l.name = p.name ) WHERE p.type IN ( 'S', 'G', 'U' ) AND p.name <> 'sa'

ELSE

DECLARE login_curs CURSOR FOR

SELECT p.sid, p.name, p.type, p.is_disabled, p.default_database_name, l.hasaccess, l.denylogin FROM

sys.server_principals p LEFT JOIN sys.syslogins l

ON ( l.name = p.name ) WHERE p.type IN ( 'S', 'G', 'U' ) AND p.name = @login_name

OPEN login_curs

FETCH NEXT FROM login_curs INTO @SID_varbinary, @name, @type, @is_disabled, @defaultdb, @hasaccess, @denylogin

IF (@@fetch_status = -1)

BEGIN

PRINT 'No login(s) found.'

CLOSE login_curs

DEALLOCATE login_curs

RETURN -1

END

SET @tmpstr = '/* sp_help_revlogin script '

PRINT @tmpstr

SET @tmpstr = '** Generated ' + CONVERT (varchar, GETDATE()) + ' on ' + @@SERVERNAME + ' */'

PRINT @tmpstr

PRINT ''

WHILE (@@fetch_status <> -1)

BEGIN

IF (@@fetch_status <> -2)

BEGIN

PRINT ''

SET @tmpstr = '-- Login: ' + @name

PRINT @tmpstr

IF (@type IN ( 'G', 'U'))

BEGIN -- NT authenticated account/group

SET @tmpstr = 'IF NOT EXISTS (SELECT * From syslogins WHERE loginname = '''+ ( @name ) + ''' )' + char(13) +

'CREATE LOGIN ' + QUOTENAME( @name ) + ' FROM WINDOWS WITH DEFAULT_DATABASE = [' + @defaultdb + ']'

END

ELSE BEGIN -- SQL Server authentication

-- obtain password and sid

SET @PWD_varbinary = CAST( LOGINPROPERTY( @name, 'PasswordHash' ) AS varbinary (256) )

EXEC sp_hexadecimal @PWD_varbinary, @PWD_string OUT

EXEC sp_hexadecimal @SID_varbinary,@SID_string OUT

-- obtain password policy state

SELECT @is_policy_checked = CASE is_policy_checked WHEN 1 THEN 'ON' WHEN 0 THEN 'OFF' ELSE NULL END FROM sys.sql_logins WHERE name = @name

SELECT @is_expiration_checked = CASE is_expiration_checked WHEN 1 THEN 'ON' WHEN 0 THEN 'OFF' ELSE NULL END FROM sys.sql_logins WHERE name = @name

SET @tmpstr = 'IF NOT EXISTS (SELECT * From syslogins WHERE loginname = '''+ ( @name ) + ''' )' + char(13) +

' CREATE LOGIN ' + QUOTENAME( @name ) + ' WITH PASSWORD = ' + @PWD_string + ' HASHED, SID = ' + @SID_string + ', DEFAULT_DATABASE = [' + @defaultdb + ']'

IF ( @is_policy_checked IS NOT NULL )

BEGIN

SET @tmpstr = @tmpstr + ', CHECK_POLICY = ' + @is_policy_checked

END

IF ( @is_expiration_checked IS NOT NULL )

BEGIN

SET @tmpstr = @tmpstr + ', CHECK_EXPIRATION = ' + @is_expiration_checked

END

END

IF (@denylogin = 1)

BEGIN -- login is denied access

SET @tmpstr = @tmpstr + '; DENY CONNECT SQL TO ' + QUOTENAME( @name )

END

ELSE IF (@hasaccess = 0)

BEGIN -- login exists but does not have access

SET @tmpstr = @tmpstr + '; REVOKE CONNECT SQL TO ' + QUOTENAME( @name )

END

IF (@is_disabled = 1)

BEGIN -- login is disabled

SET @tmpstr = @tmpstr + '; ALTER LOGIN ' + QUOTENAME( @name ) + ' DISABLE'

END

PRINT @tmpstr

END

FETCH NEXT FROM login_curs INTO @SID_varbinary, @name, @type, @is_disabled, @defaultdb, @hasaccess, @denylogin

END

CLOSE login_curs

DEALLOCATE login_curs

RETURN 0