how to restore deleted user accounts and their group active directory?

Answer 1

Do you have a back up of the system(s) these accounts were on? If so you can run the restore feature of your backup solution and have them back in place in little time at all. If not then they are simply gone for good.

If you have backed up your computers on your network each night you should have the accounts and settings in those backups. Open your backup solution and follow the instructions for doing a restore of the needed accounts. I don't know which solution you use, so I can't give any detailed information on the steps you need to take, but most are simular to each other. All have a way of accessing a particular backup folder and "wizards" to walk you through the process of a restore. If you need to you may have to restore the entire system and all related files and settings, by using the image file backup of the affected system. This is not difficult either and you can be up and running again in as short as an hour.

If you are unfamiliar with the process call in somebody who is familiar with it and have that individual perform the necassary steps. If you have not been backing up your system states or files and settings on a regular basis, then I suppose this is an opportunity for you to begin doing so. I am not trying to offend, just put a postive spin on a bad situation. Mistakes are for learning from and therefore if something is learned it is not a bad thing at all, but a positive experiance. Right? ;-)

Good luck and have a great evening!