Enable Backup and Restore for Group Policy

Hi guys,

while surfing the net I found this cool blog about enabling backup and resoter for your group policies.

Jeremy Moskowitz wrote it and here’s a little preview of the article. On the end is the link to the complete article.

Continue reading “Enable Backup and Restore for Group Policy”

How to restore AD & Exchange Mailbox

In this article, I have explained the various steps involved in re-producing the subject issue.

Before you begin To perform the following procedures, the account must be delegated the following:

Exchange Organization Administrator Role Continue reading “How to restore AD & Exchange Mailbox”

McAfee DAT update causes windows to crash (UPDATE NEW DAT FILE)

McAfee has caused multiple systems to crash after a DAT update to 5958. It causes to falsly identify svchost.exe as virus W32/Wecorl. McAfee has tackeld this problem and released update 5959 to prevent this from happening. Here’s McAfee’s own statement about this false positive: Continue reading “McAfee DAT update causes windows to crash (UPDATE NEW DAT FILE)”

Back Up and Restore the DHCP Database

DHCP servers store DHCP lease and reservation information in database files. By default, these files are stored in the %SystemRoot%System32DHCP directory. The key files in this directory are used as follows:
  • Dhcp.mdb The primary database file for the DHCP server
  • J50.log A transaction log file used to recover incomplete transactions in case of a server malfunction
  • J50.chk A checkpoint file used in truncating the transaction log for the DHCP server
  • Res1.log A reserved log file for the DHCP server
  • Res2.log A reserved log file for the DHCP server
  • Tmp.edb A temporary working file for the DHCP server

Backing Up the DHCP Database
The Backup directory in the %SystemRoot%System32DHCP folder contains backup information for the DHCP configuration and the DHCP database. By default, the DHCP database is backed up every 60 minutes automatically. To manually back up the DHCP database at any time, follow these steps:
1. In the DHCP console, right-click the server you want to back up, and then click Backup.
2. In the Browse For Folder dialog box, select the folder that will contain the backup DHCP database, and then click OK.

Registry keys that control the location and timing of DHCP backups, as well as other DHCP settings, are located under HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesDHCPServerParameters.

The following keys control the DHCP database and backup configuration:

  • BackupDatabasePath Sets the location of the DHCP database. You should set this option through the DHCP Properties dialog box. Click the Advanced tab, and then set the Database Path field as appropriate.
  • DatabaseName Sets the name of the primary DHCP database file. The default value is DHCP.mdb.
  • BackupInterval Determines how often the DHCP client information database is backed up. The default is 60 minutes.
  • DatabaseCleanupInterval Determines how often the DHCP service deletes expired records from the DHCP client information database. The default is four hours.

Restoring the DHCP Database from Backup
In the case of a server crash and recovery, you might need to restore and then reconcile the DHCP database. To force DHCP to restore the database from backup, follow these steps:
1. If necessary, restore a good copy of the %SystemRoot%System32DHCPBackup directory from the archive. Afterward, start the DHCP console, right-click the server you want to restore, and then click Restore.
2. In the Browse For Folder dialog box, select the folder that contains the backup you want to restore, and then click OK.
3. During restoration of the database, the DHCP Server service is stopped. As a result, DHCP clients are temporarily unable to contact the DHCP server to obtain IP addresses.

How To Backup and Restore Group Policy

By now you have probably Created a Central Store for Group Policy Administrative Templates and imported the Terminal Server & XenApp Tuning Group Policy, but what about backup? Did you know that Microsoft have created Group Policy Management Console (GPMC) scripting samples that makes it extremely fast and easy to backup Group Policy Objects (GPO). With these sample scripts you can backup all or single GPO’s, grant permissions, import, restore, list and more. Check out the script examples here.

Download and install the GPMC Scripting Samples and create a weekly scheduled task.

Command line example :

cscript "C:Program FilesMicrosoft Group PolicyGPMC Sample ScriptsBackupAllGPOs.wsf"
"%XA%Group PolicyBackups" /Comment:"GPO Weekly Backup on %DATE%_%TIME%"

If something should happen to your GPO it’s very easy to restore it, with a script or simply by selecting “Restore from Backup” within GPMC shown in the picture above.

ePO 4.5 backup and restore procedure

If you ever are in the situation that your ePO 4.5 server crashed and you need to reinstall it check it this procedure for getting it started and running again:


NOTE: If you don’t follow these steps then you arein trouble. Make sure you have the same server name and same database instance name (EPOSERVER). Otherwise you can reinstall SQL again to get it working !!!!!