Auto map network drives on login for all users

1. Save the following batch file to the domain controller's NETLOGON share as logon.bat:
   @echo off
   net use * /delete /yes
   net use x: \\server_name\shared_directory_name
2. Active Directory Users and Computers
3. Right click domain name at top left and click Properties > Group Policy > Edit > User Configuration > Windows Settings > Scripts (Logon/Logoff) > Logon > Add…
4. Enter path to logon.bat (e.g., \\ACME.local\sysvol\ACME.local\scripts\logon.bat) and click OK three times
5. Login from workstation. Drive x: should appear in My Computer.

Auto map network drives on login for certain users:

1. Save the following batch file to the domain controller's NETLOGON share as logon.bat:
   @echo off
   net use * /delete /yes
   net use x: \\file_server_name\shared_directory_name
2. Active Directory Users and Computers > Users > Double click user > Profile
3. Enter "logon.bat" (no quotes) in the "Logon script" box and click OK
4. Login from workstation as user modified in step 2. Drive x: should appear in My Computer.

Auto map network drives on login based on Group membership

1. Get KiXtart
2. Put WKIX32.EXE in both the domain controller's NETLOGON share and %SystemRoot% (normally C:\WINNT\).
3. Save the following script as map_drive.kx to the NETLOGON share (be sure to change the group as needed – here we've used Domain Users):
   use "*" /DELETE
   if ingroup("Domain Users")
   use x: "\\server_name\share_name"
   endif
4. Save the following batch file (which calls your KiXtart script) as login.bat to the domain controller's NETLOGON share:
   @echo off
   \\server_name\NETLOGON\WKIX32.EXE \\server_name\NETLOGON\map_drive.kx
5. Active Directory Users and Computers
6. Right click domain name at top left and click Properties > Group Policy > Edit > User Configuration > Windows Settings > Scripts (Logon/Logoff) > Logon > Add…
7. Enter path to login.bat (e.g., \\ACME.local\sysvol\ACME.local\scripts\login.bat) and click OK three times
8. Login from workstation as a user belonging to group designated in map_drive.kx. Drive x: should appear in My Computer.
9. If x: does not appear, check the permissions of NETLOGON, WKIX32.EXE, your script files, etc. Also, make sure that the user or group has the necessary permissions on the shared folder you are mapping.

More KiXtart Examples

1. Map drive if user is *not* a member of a certain group (in this case, "Students"):

   If InGroup("Students") = 0
      Use R: "\\server\records"
   EndIf
   

2. Using Boolean operators:

   If InGroup("Teachers") Or InGroup("Office") Or InGroup("PTA")
      Use G: "\\server\Grownup_Files"
   EndIf
   
   If InGroup("2008 Class") And InGroup("Honors")
      Use S: "\\server\smart_kids"
   EndIf
   

3. Using Select…EndSelect (stops processing on the first true Case)

   Select
      Case InGroup("Students")
         Use S: "\\server\student_storage"
      Case InGroup("Office")
         Use O: "\\server\office_docs"
         Use R: "\\server\records"
      Case InGroup("Teachers")
         Use O: "\\server\office_docs"
         Use S: "\\server\student_storage"
         Use T: "\\server\teaching_materials"
   EndSelect
   

Source: http://tinyapps.org/docs/auto_map_network_drives.html

Time synchronization is an important aspect for all computers on the network. By default, the clients computers get their time from a Domain Controller and the Domain Controller gets his time from the domain’s PDC Operation Master. Therefore the PDC must synchronize his time from an external source. There are servers listed at the NTP Pool Project website. Before you begin, don’t forget to open the default UDP 123 port (in- and outbound) on your firewall. 

1. First, locate your PDC Server. Open the command prompt and type: C:\>netdom /query fsmo
2. Log in to your PDC Server and open the command prompt.
3. Stop the W32Time service: C:\>net stop w32time
4. Configure the external time sources, type: C:\> w32tm /config /syncfromflags:manual /manualpeerlist:”0.pool.ntp.org, 1.pool.ntp.org, 2.pool.ntp.org”
5. Make your PDC a reliable time source for the clients. Type: C:\>w32tm /config /reliable:yes
6. Start the w32time service: C:\>net start w32time
7. The windows time service should begin synchronizing the time. You can check the external NTP servers in the time configuration by typing: C:\>w32tm /query /configuration
8. Check the Event Viewer for any errors.

source: http://defaultreasoning.wordpress.com/2009/11/16/synchronize-time-with-external-ntp-server-on-windows-server-2008-r2/